Midnight Black by Mark Greaney

On June 20, 2025 By The Unseen LibraryIn Audiobook, Five-Star Books, Thriller3 Comments

Publisher: Sphere/Audible (Audiobook – 18 February 2025)

Series: Gray Man – Book 14

Length: 15 hours and 51 minutes

My Rating: 5 out of 5 stars

The always outstanding Mark Greaney provides another addictive and heart-pounding addition to his iconic Gray Man series with the incredible 2025 spy thriller, Midnight Black.

Ever since I started getting fully into the thriller genre, one of the main authors I check out each year is Mark Greaney, a veteran master of thriller fiction who has produced some incredible reads. Some of his more entertaining books include his Josh Duffy series (Armored and Sentinel), as well as the fun military thriller Red Metal (cowritten with Hunter Ripley Rawlings IV). However, his best-known body of work is the long-running Gray Man series, which was adapted into a Netflix movie of the same name.

The Gray Man series is an outstanding collection of spy thriller novels that follows elite assassin and black ops operative Court Gentry, better known by the titular moniker of the Gray Man, as he faces off against an array of deadly enemies while occasionally working for the CIA. I have become a pretty major fan of the Gray Man series thanks to the author’s complex stories, gritty action sequences and damaged characters, and I have had a blast with books like The Gray Man, Mission Critical, One Minute Out (one of my favourite books and audiobooks of 2020), Relentless (one of my favourite books and audiobooks of 2021), Sierra Six (one of my favourite books and audiobooks of 2022), Burner (one of my favourite books and audiobooks of 2023) and The Chaos Agent (one of my favourite books of 2024). Due to how epic all these previous Gray Man entries have been, I couldn’t wait to get my hands on the next entry in the series, Midnight Black. Providing an intense follow-up to a fantastic cliffhanger from the last book, Midnight Black was one of my most anticipated releases of 2025, and it really did not disappoint.

In the icy wilds of Mordovia, lies the brutal woman’s penal colony IK-2 Yavas. A harsh work camp for the many political enemies of the current Russian regime, IK-2 Yavas is hell on earth for any women who have defied the state. However, despite the prison holding many prominent criminals and politicians, their most valuable prisoner is former spy Zoya Zakharova.

Once a prominent Russian foreign intelligence agent, Zoya was forced to flee her position and eventually found herself working covertly for the CIA as a deniable asset. However, after being captured by the Chinese and traded to the Russians, Zoya’s future is bleak as she is slowly worked to death. Worse, a ruthless FSB operative is using Zoya as bait for the person most important left in her life, her lover Court Gentry, the Gray Man. But, unknown to Zoya, the Gray Man is far closer than she realises.

Having spent months prowling the Eastern European countries, Gentry seeks a way to steal across the Russian border and save the woman he loves, no matter the cost. Embarking on a risky entry plan with only minimal help from his old CIA contacts, Gentry is determined to find Zoya and kill anybody who gets in his way. But with the entire Russian state security apparatus turned against him, can Gentry once again do the impossible and save Zoya, or will this be the final mission for the legendary Gray Man?

Mark Greaney continues to impress with his epic Gray Man series, as the 14^th brilliant entry in the series, Midnight Black, was absolute fire. Providing an intense and deeply addictive spy thriller narrative, Midnight Black hooked me from the very beginning and refused to let go until the final explosive confrontation. Slick, emotionally charged and very clever, Midnight Black gets an easy five-star rating from me, and I had such an amazing time listening to it.

This proved to be an outstanding book to get through, as Midnight Black featured a compelling and cinematic narrative that had me hooked the entire way through. Expertly following on from the emotional cliffhanger from the end of the previous book in the series, The Chaos Agent, Midnight Black starts several months later and sees a desperate Court Gentry doing anything he can to try to enter Russia, only to encounter setbacks he has to take care of in his usual destructive manner. This works as an excellent introduction to Midnight Black’s plot, especially as it helps you appreciate the emotional stakes of the book, and you quickly become invested in the protagonist’s quest. Greaney quickly expands the plot through several additional character perspectives, including recuring characters Zack Hightower and Zoya Zakharova, who have their own missions/problems, an intriguing new Russian rebel protagonist, and the perspective of some sinister Russian operatives, including the FSB agent pulling all the strings around Zoya’s imprisonment. This serves as a great base for the rest of the story, and the author soon starts to feature some of the more complex and action-packed sequences in Midnight Black.

Starting with a well-layered extended shootout sequence in Europe, the second half of Midnight Black hits hard and keeps the reader deeply engaged. Greaney continues to set out quite an impressive story, as Gentry enters Russia and proceeds to cause all manner of havoc, while his allies in Europe and the US throw together an audacious plan that really amps up the narrative. Greaney keeps the plot constantly moving, taking the protagonists from one dangerous situation to the next, with compelling character moments and well-featured exposition that keeps everything going forward. The author also throws in a ton of high-octane and memorable sequences, including a fun extended chase in Moscow involving a stolen train, which was so entertaining to behold. Everything leads up to the big finale in the last third of the story, where the protagonist makes his play to free Zoya in very cinematic fashion. There is a lot of intense anticipation involved in the leadup to this final part of Midnight Black, and it proves to be particularly captivating and exciting. The conflict, high stakes and constant worry you have for the characters ensures you won’t be able to put this part of the book down, and I was so keen to see how everything came together. Greaney wraps things up perfectly, and I liked the hopeful conclusion to Midnight Black, especially after some of the dark preceding books, and you come away satisfied, as well as excited to see where the series goes next.

I am always greatly impressed with how Greaney sets out his outstanding novels, and Midnight Black is a particularly strong example of this. A fast-paced book with several interesting layers to it, Midnight Black drags you in with its powerful narrative and keeps you there with the well-set-out action, complex characters, and gritty realism. Thanks to the blend of character arcs and alternating storylines, there is a lot going on in Midnight Black, and you are given a great mixture of ultra-exciting sequences of action and spy craft, intense personal moments of despair and hope, as well as a cool dive into real-world issues, such as the current war in Ukraine, that enhance the overall plot. I particularly enjoyed the gritty realism loaded in the story, especially when it comes to looking at the current politics of Russia, and there was a particular dire tone to much of the plot that was well mirrored by several protagonist’s circumstances.

One of the writing techniques I always enjoy with the Gray Man novels is the author’s excellent use of alternating character perspectives, as the reader gets to see the narrative through a variety of different viewpoints. While primary characters like Gentry, Hightower and Zakharova naturally get most of the focus, you also see events through the eyes of more minor protagonists, such as Gentry’s former CIA handler in the US, or a Russian rebel fighter launching attacks in Moscow, as well as from several of the book’s antagonists. This provides a much more expansive narrative for readers, especially as you soon understand the compelling motivations of all the significant characters, as well as their often conflict plans and schemes. I particularly enjoyed how well some of Midnight Black’s many action sequences become even more impressive when you get to see events through the eyes of all the participants in the event. Seeing all the alternate sides of conflicts really helps to make the fight sequences stand out, and it is captivating to see the various moves and countermoves of all the characters involved. I felt this worked particularly well in some of the book’s big firefights, such as one sequence out in the woods where Gentry and Hightower’s camp gets raided by a squad of hitters, and you really get drawn into the books brutal action thanks to this.

While Midnight Black can probably be read as a standalone novel, especially as Greaney does a good job recapping key events, I feel that this latest Gray Man novel is probably best enjoyed by those who have read the previous books in the series, especially the preceding entry, The Chaos Agent. This is mainly because Greaney is following up on a major cliffhanger from the previous book, and a lot of the emotional weight of the plot is based around the protagonist trying to right this wrong and save the woman he loves. Being invested in the relationship between Gentry and Zakharova, as well as appreciating the protagonist’s other character relationships, really helps to amp up the stakes of Midnight Black, and I know I was personally hooked on seeing how events played out. While having this background does enhance the experience, I do think that new readers can easily come into the series here and still have an amazing time, especially once they get caught up in the intense plot.

I also need to once again compliment the compelling characters found within Midnight Black, as Greaney really went out of his way to create some intense character moments in this latest Gray Man novel. A lot of this revolves around the protagonist, Court Gentry, who finds himself in emotional turmoil following the Russians imprisoning the woman he loves. Unsure about her fate and desperate to enter Russia to rescue her, Gentry is a ghost of his former self, recklessly engaging in deadly actions without his former skill and tradecraft. This uncharacteristic lack of planning from the main protagonist and the way he lets his emotions overwhelm him adds a compelling edge to the story, especially as it results in more carnage and close calls.

The rest of the cast are also well featured in Midnight Black, especially as Greaney brings back several old favourites in dire circumstances. For example, Court’s love interest, Zoya Zakharova, ends up having a particularly powerful arc in Midnight Black, as she is imprisoned in a Russian work camp. Slowly losing hope due to her surroundings, her imminent execution, and her worry for Court, Zoya’s scenes are often hard to read and really help to hammer home the dark stakes of the book. Greaney also brings back fun recurring character Zack Hightower, who serves as a lighter point of view protagonist compared to Court and Zoya. A veteran operator with a lot of history with the other protagonists, Zack was a great foil for Court’s moodier persona in Midnight Black, and I loved seeing them work together in this way. Other characters of note include Court’s former CIA handler, Matthew Hanley, who works to provide outside help despite his own downward career trajectory, and Major Colonel Eriks Baronov, an FSB operative trying to use Zoya as bait for the Gray Man. I really enjoyed how Hanley and Baronov provided interesting alternating tactical insights into the events of Midnight Black, which gave the novel a great global conflict feel at times. All these characters and more helped to turn Midnight Black into something special, and I really enjoyed how complex and exciting the various character-driven storylines turned out to be.

As has become my habit with the Gray Man series in recent years, I ended up listening to Midnight Black on audiobook rather than reading a physical copy. I find that the audiobook version of the Gray Man books, narrated by the always reliable Jay Snyder, are an excellent way to absorb Greaney’s fantastic stories, especially as the various action sequences and compelling showcases of spycraft are highlighted particularly well in this format. For Midnight Black, I listened to this audiobook while on a holiday with a lot of flying/driving time, which not only kept me from getting bored on the bus/plane but which ensured that I absolutely powered through its near 16-hour run time. It helped that many of the best sequences in the book, such as the epic firefight at the halfway point and the big chase through Moscow, were particularly impactful in this format, and Snyder did an excellent job voicing all the characters. I particularly appreciated all the eastern European and Russian accents that Snyder attributed to the various characters, and he also did a good job capturing key parts of the protagonist’s personalities, especially Gentry’s weariness and desperation that were a key part of this book. Due to this brilliant voice work, as well as my general love for the format, I would strongly recommend Midnight Black on audiobook, and I can guarantee it makes for great entertainment on long road trips.

Overall, Midnight Black was another outstanding and captivating new entry in the always impressive Gray Man series. Author Mark Greaney did an amazing job continuing one of the very best spy thriller series out there, and I deeply enjoyed Midnight Black’s particularly intense and personal story. Featuring some fantastic action, complex character arcs and some compelling insights into major contemporary events, Midnight Black was extremely addictive, and I cannot wait to see how Greaney continues the series in the future.

Amazon

The Chaos Agent by Mark Greaney

On June 30, 2024 By The Unseen LibraryIn Audiobook, Five-Star Books, Thriller13 Comments

Publisher: Sphere/Audible (Audiobook – 20 February 2024)

Series: Gray Man – Book 13

Length: 17 hours and 34 minutes

My Rating: 5 out of 5 stars

Amazon

One of the leading authors of the spy thriller genre, Mark Greaney, returns with another epic entry in his iconic Gray Man series, The Chaos Agent.

Readers of this blog will know that I am a massive fan of thriller author Mark Greaney, who has been wowing the world with his elaborate and exciting stories for years. Ever since I started reading thrillers, Greaney has been a major figure in my yearly reading schedule, with books like Armored and Red Metal (cowritten with Hunter Ripley Rawlings IV), ensuring that he became a must-read author for me. However, his most iconic body of work is his Gray Man series, which follows legendary former CIA agent and assassin Court Gentry, known as the Gray Man, as he engages in carnage across the world. This series, which people may be familiar with thanks to the Netflix adaptation, is so damn good, and I really love the elaborate and intense stories that emerge. This includes the impressive first novel The Gray Man, as well as later books like Mission Critical, One Minute Out (one of my favourite books and audiobooks of 2020), Relentless (one of my favourite books and audiobooks of 2021) and Sierra Six (one of my favourite books and audiobooks of 2022) and Burner (one of my favourite books and audiobooks of 2023). Naturally, I grabbed Greaney’s latest novel, The Chaos Agent, the first chance I could, and it proved to be another amazing read.

Across the world, elite scientists are being murdered in a series of elaborate and well-coordinated assassinations. The killers are well equipped, well prepared, and seem capable of striking across multiple countries. The only connection between the killings is the area of expertise the victims are known for, as someone is targeting the world’s leading experts in artificial intelligence and robotics.

As the killings continue, it appears that only two major assassins aren’t involved in the plot, the Gray Man, Court Gentry, and his lover Zoya Zakharova. Hiding out in Central America after their last mission once again forced them to become fugitives, Court and Zoya are seeking the quiet life together after all their years apart. But an assassin’s work is never done, and soon an old family friend of Zoya’s seeks them out, hoping that they can help identify the individuals behind the attack. Initially reluctant to get involved, Court and Zoya soon find themselves targeted by association, and must flee an army of dangerous killers and mysterious advanced combat drones.

Forced to find out who is hunting them, Court and Zoya soon discover that the killings are linked to a deadly proposed artificial intelligence weapon that could change everything about modern warfare. To discover what’s truly going on, the two former agents and their allies need to investigate the one survivor of the ongoing assassinations. But with their target now protected by an old friend of theirs, Zack Hightower, in an isolated fortress, Court and Zoya will need to use all their connections and luck to find the truth before it’s too late?

The Chaos Agent was another excellent novel from Greaney, who continues to highlight why he is one of the world’s leading spy thriller writers. This latest Gray Man novel ended up being a lot of fun, especially as Greaney goes a little overboard with the plot, and I deeply enjoyed the resulting adventure.

Greaney came out of the bag with something very exciting in The Chaos Agent, which is mainly down to how over-the-top and crazy the main narrative ended up being. This story starts off relatively low-key, with a couple of random killings, and an update on the lives of the protagonist, Court Gentry, and his partner Zoya Zakharova. Naturally, it doesn’t take long for Gentry and Zakharova to get dragged into the action, and this starts an intense fugitive arc for them, as they find themselves being hunted by various killers across central America. At the same time, the other supporting characters of the book are investigating the worldwide plot around the assassination of various AI experts. This results in a compelling investigation angle that continues for a large portion of The Chaos Agent, and it was fun to not completely know the identity of the book’s antagonist until towards the end. This first half of The Chaos Agent definitely got my attention, and the compelling action, intense mystery, and intriguing characters help to draw the reader in.

The second half of The Chaos Agent is where things start to get particularly interesting, as Greaney amps up the story and throws it into overdrive. In particular, the antagonists get even more crazy, which is well shown in an intense action sequence involving Gentry and Zakharova in contact’s house in Central America. These additional opponents give The Chaos Agent a real science fiction edge to them, and it was a gloriously over-the-top inclusion that I really loved. The various character storylines soon come together after that, as all the characters end up in Cuba investigating who is truly behind everything and why. There are some cool sequences here, including complex and intricate multi-perspective operations as various players manoeuvre around each other to achieve their goals. This all leads up nicely to the big extended finale, where all hell breaks loose as Greaney sets up a massive firefight with various sides thrown into the mix. The action here is intense, with the carnage flying thick and fast, and with so many perils coming for the protagonists. It all ends on a pretty big cliffhanger that will play nicely into the next book in the series, especially as two major supporting characters find their situation drastically changed due to their decisions.

I deeply enjoyed how this cool novel unfolded, and Greaney utilises his trademark writing style to great effect with this excellent story. The high-intensity action, fast-paced plot, and intriguing overarching storyline came together wonderfully, and it proves very hard not to get drawn into The Chaos Agent as a result. I particularly love how Greaney so effortlessly jumps between different character perspectives throughout the course of the book, which allows for a more complex and enhanced story. These quickfire changes in perspective also work extremely well in some of the book’s more intense sequences, especially as seeing the various participants continuously react to other character’s actions, allows for some outstanding scenes. Good examples of this include a sequence in the Cuban docks where Gentry and a rival assassin move around each other trying to simultaneously protect or kill their target. These scenes, and more, are true highlights of this book, and I love how well they were able to incorporate the particularly eccentric inclusions that Greaney featured within The Chaos Agent.

As with most of the books in the Gray Man series, The Chaos Agent can easily be read as a standalone novel. Greaney does a good job of recapping any the relevant key events from the prior novels where needed so new readers can enjoy this book without knowing anything about the rest of the series. That being said, established Gray Man readers will probably get a little more out of The Chaos Agent, especially when it comes to seeing how the various character relationships unfold. It also helps that this proved to be a particularly memorable entry in the series. Not only does Greaney go all out with his very inventive and exciting story, but there is a great combination of story elements there that everyone can enjoy. The intense action pairs well with a deep dive into modern technology elements, and Greaney pulls together an intriguing mystery about who is behind everything, rather than showing the antagonist from the get-go. While some of the twists around the true antagonist are a little predictable, Greaney played them out well, and they worked into the massive status quo changes at the end of the book. I will admit that I did find some of Greaney’s writing, including the dialogue, to be a little robotic at times in The Chaos Agent, which is kind of ironic when you consider the story focus. The way some parts of the writing or dialogue came together just didn’t feel right to me at times, and that slightly decreased my enjoyment of the book. Still, the awesome story more than made up for it, and I felt this was an awesome addition to the overall series, especially as the epic ending has got me extremely excited for the next book.

One of the things that I really enjoyed about The Chaos Agent was Greaney’s intriguing look at the future of AI and how it could be utilised in the military and intelligence fields. Greaney clearly did some research on the subject, and several characters spend significant time lecturing about the potential advantages and dangers of AI weaponry. I found this to be utterly fascinating, and this ends up being quite a key part of the book, especially once the protagonists find themselves beset by advanced drones and other distinctive weaponry. As I mentioned above, Greaney uses this AI concept to make The Chaos Agent a little more science fiction than his previous novels. While I won’t go into too much detail here, as frankly it is best experienced in the context of the story, some of these elements were very outrageous, and it made the story quite fun with some unique action. While it was very over-the-top, Greaney did paint everything with a film of realism, and I came away from The Chaos Agent with a healthy respect and fear for the potential future of AI in the military, especially as Greaney is probably right and someone will use it to kill the rest of us.

Aside from the complex writing and cool AI elements, The Chaos Agent’s story is also enhanced by a great cast of characters who are cleverly showcased throughout the plot. This includes protagonist Court Gentry and his partner Zoya Zakharova, who were reunited in the last book. Gentry and Zakharova form an effective team as the main protagonists of The Chaos Agent, and it was fun to see them in action again. However, Greaney also adds in an element of dissention, especially as neither really has the ability to trust other people, and they are both concerned about their potential future. Their combined storyline goes in some interesting directions, and the final twist of the book ensures that their relationship will be a big part of the next entry in the series. Greaney also brings back fun recurring character Zack Hightower, who worked with Gentry and Zakharova in the past. Hightower is always great value for money, and he had an interesting run in The Chaos Agent as he’s hired as security for a tech billionaire being targeted. Hightower ends up being an integral part of the book, and it was great to see him working with Gentry and Zakharova again, especially as his new job leads to some dark moments for him. Throw in an excellent supporting cast, which includes some recurring faces and some new intriguing antagonists, and this ended up being an excellent book that makes fantastic use of its characters.

I have always found that the best way to enjoy one of the Gray Man novels is to listen to it in its audiobook format, which really enhances the story. This is once again true for The Chaos Agent, which turned out to be such an epic listen. The audiobook format, which has a substantial runtime of 17 and a half hours, proved to be a lot of fun, and I deeply appreciated how well it enhanced Greaney’s already fun story and writing style. The constant movement between perspective characters, especially in the action sequences, comes across really well, and the intense fights feel so much more real and impactful when they are read out. It helps that The Chaos Agent was once again narrated by Jay Snyder, who has voiced all the other Gray Man novels. Snyder has a great vocal range that really lends itself to a spy thriller novel like The Chaos Agent, and all the over-the-top tough characters are captured extremely well in this audiobook, with Snyder expertly bringing back recurring voices from the previous Gray Man audiobooks. The rest of the extended cast also get appropriate and fitting tones, and you can see Snyder is really trying to get the voices to match the characters. This includes accents, as Snyder tries to capture many of the ethnicities captured within The Chaos Agent’s story, including a pretty good attempt at the New Zealand accent. As such, I really found myself getting drawn into The Chaos Agent’s story while listening to it, and while Snyder can also be a tad robotic at times, this audiobook format was a pretty exceptional way to enjoy this amazing book.

Overall, The Chaos Agent was another excellent addition to one of the very best spy thriller series currently running. Mark Greaney always goes all out with his amazing Gray Man novels, and The Chaos Agent is one of his most intense and gripping reads yet. Clever, compelling, and featuring some particularly fun story features, The Chaos Agent is an excellent read that gets another five-star rating from me.

Amazon

Sierra Six by Mark Greaney

On March 22, 2022February 2, 2023 By The Unseen LibraryIn Audiobook, Five-Star Books, Thriller22 Comments

Publisher: Sphere/Audible Audio (Audiobook – 15 February 2022)

Series: Gray Man – Book 11

Length: 15 hours and 58 minutes

My Rating: 5 out of 5 stars

Amazon Book Depository

Epic thriller author Mark Greaney returns with the latest entry in his incredible Gray Man series with Sierra Six, an intense and captivating spy thriller that will grab your attention and refuse to let go until the final explosion.

Over the last few years, I have been absolutely hooked on the incredible thrillers of Mark Greaney, who is easily one of the best authors of spy fiction in the world today. Not only did he cowrite a very cool military thriller, Red Metal (one of my favourite books and audiobooks of 2019), but he has continued his exceptional Gray Man series. The Gray Man books follow Court Gentry, the titular Gray Man, an elite assassin and undercover operator who has worked both for and against the CIA. This series has been so very cool, from the first novel The Gray Man (set to become a Netflix movie later this year), to the last three awesome entries, Mission Critical, One Minute Out (one of my favourite books and audiobooks of 2020) and Relentless (one of my favourite books and audiobooks of 2021). Due to how impressive this series has been, I have been really excited to read the next book, Sierra Six, and it was one of my most anticipated releases of 2022, especially as it had a very cool plot to it.

Court Gentry, the Gray Man, is once again the world’s most wanted spy, hunted by his former employers, the CIA, and every other intelligence agency on the planet. Looking for work, Gentry accepts an easy infiltration mission in Algeria to spy on a delegation from Pakistan. However, the mission goes sideways when Gentry recognises one of the Pakistanis and his rookie technical officer is captured. Chasing after the kidnappers, Gentry follows their trail to India and must relive one of the darkest moments from his past.

12 years ago, long before he became the Gray Man, Court Gentry was a talented young agent for the CIA. Specialising in solo operations, Gentry is suddenly reassigned to Ground Branch and must work as the junior member of veteran CIA action team, Golf Sierra. Given a new designation, Sierra Six, Gentry is forced to adapt to a new way of fighting as he and his team attempt to hunt down a dangerous terrorist leader in Pakistan. However, their mission resulted in a high body count and a great personal loss that has haunted Gentry ever since.

Now, as Gentry works his way through Mumbai, he must face the realisation that the target of his original Sierra Six mission is still alive and active after all these years. Determined to finish the job once and for all, Gentry works with a small team of rogue operators to find his target. However, his old foe has initiated a bold new plan that could have devastating consequences for all of India. Can Gentry get his revenge before it is too late, or will the ghosts of his past finally finish him off?

Greaney is in fine form with Sierra Six as he has written another excellent and intense spy thriller that I deeply enjoyed. Containing an action-packed and multilayered narrative loaded with major set pieces, exciting spy elements and some complex characters, this was another awesome Gray Man novel from Greaney.

Sierra Six was an absolutely thrilling read and I had an outstanding time getting through the impressive and addictive narrative. Greaney does something a little different for this book and features an excellent and intricate split timeline narrative, with the book divided between the events of the past when Gentry was part of Golf Sierra, and the current events in Mumbai which see Gentry again contending with the target of this original mission. The narrative switches between the two timelines every chapter or two and you get a great sense of what is happening in both well-established storylines. These two plot lines advance at a great pace throughout the entire novel and feature their own range of distinctive and fun supporting characters, some of whom appear in both the contemporary and past storylines. I had a lot of fun with the two separate periods, and I loved how they both made excellent use of interesting characters, fantastic developments and a ton of high-octane action sequences.

The timelines support each other extremely well, with certain hints about the events of the past contained in the contemporary storyline increasing anticipation for the historical storyline, while revealed details about the villain and the young Court Gentry from 12 years ago enhance the protagonist’s current adventure. In both cases, Gentry and his allies embark on a methodical hunt for their quarry, with a high body count accumulating as they follow various leads and respond to their opponent’s counter plays. While primarily told from Gentry’s perspective, both timelines utilise distinctive side characters to great effect, and you see intriguing supporting perspectives, including from the antagonist, that help to widen the picture and enhance the richness of the story. Both timelines eventually lead up to an awesome final sequence, comprised of two near-suicidal missions that the protagonist is engaged in. This final section of the novel is extremely fast paced, especially as Greaney shortens the chapters and introduces more frequent jumps between the timelines to make everything seem even more frenetic. Both timelines end with some incredible and awesome major set pieces, and I loved how Greaney used the end of the past storyline to set up the antagonist’s eventual return. The novel ends on a great note, with the two separate storylines coming together perfectly, and the reader is left very satisfied, if a little moved, at the tragic ending of the events from 12 years ago. I was extremely impressed with how this fantastic story came together, and this ended up being an addictive read with so many awesome moments in it.

Sierra Six was a particularly good entry in this already awesome series, and I loved how Greaney was able to create a book that both stands on its own as a thriller, while also serving as an amazing entry in the wider series. This novel is structured to be very accessible to new readers, and anyone can easily pick up this book and start reading it without any knowledge of the prior entries in the series, especially as certain key elements are carefully explained when necessary. There is also a lot for established Gray Man fans to enjoy here, as Greaney provides a bit of an origin story for his long-running protagonist. Not only do we get to see Court Gentry do some of his earliest work for the CIA, but you also get to see his first interactions with key supporting characters, including Matthew Hanley and Zack Hightower. I also loved a couple of fun little cameo appearances and throwaway lines that reference some of the earlier books, including the quick but enjoyable inclusion of the antagonist from the original novel. While there is are no major continuations of some of the established storylines this is still a key and intriguing Gray Man novel, and it is one that people familiar with this series will deeply enjoy.

I was very impressed with some of the unique elements of this book, particularly those involving tradecraft, espionage work and covert combat teams. There is a real focus on tradecraft throughout Sierra Six, and the author ensures that everything feels exceedingly realistic and gritty as the characters play their spy games. Not only do you get to see some of the usual undercover work that Gentry excels in but you also get a great look at paramilitary combat, as the protagonist learns from scratch the rules of fighting as part of a combat team. All this tradecraft really adds to the authenticity of the story, although it did make parts of the book a little clunky in places, especially when the narrator or the characters explain certain espionage or military elements multiple times in overly descriptive ways.

I also rather enjoyed the exciting settings of the various timelines, as Greaney takes the reader to wartime Afghanistan, Pakistan and modern-day India. This is an interesting change of pace from most of the Gray Man novels I have read, which have been primarily set in Europe, and I liked seeing the various descriptive landscapes and unique people. Mumbai proved to be a great setting for most of the contemporary storyline, and it was very fun to see Gentry manoeuvre his way through the crowded districts and locals. I also really enjoyed the focus on Pakistani intelligence and the Indian underworld, which proved to be very fascinating. For example, the fiction criminal group B-Company are clearly based on the infamous real-life D-Company, and it was quite intriguing to see them worked into the story, while also examining their origin and goals of their leadership. All these cool tradecraft elements and intriguing settings deeply enhanced the overall story, and it made for quite a fascinating and distinctive read.

There was some rather interesting character work going on in Sierra Six as Greaney takes his fantastic protagonist to some very dark places at various points in his timeline. I really appreciated the dive back into the period before Court Gentry became the Gray Man, and Greaney paints a compelling figure of a habitual loner with no personal attachments only at the beginning of his espionage career. Watching Gentry join a team and try to play nice with others was a captivating part of the book, and it was fascinating to see the rookie Gentry get rattled by stuff he’ll become much more used to in the future. Greaney also enhances Gentry’s development by including a curious, but touching, relationship in the earlier timeline, which helped to humanise Gentry a lot. However, certain tragic elements from this help mould him into the killer we all know and love, and Greaney subtly introduced the ripples from this into the contemporary storyline. The reader leaves Sierra Six with a much better understanding of this cool character, and I had a great time seeing more of the Gray Man’s past.

Both timelines are filled with an excellent and comprehensive cast of side characters, each of whom add a great deal to the narrative and Gentry’s development in their own way. While there are a few recurring characters from the previous Gray Man novels, most of the focus are on newer figures, who Greaney provides with compelling and interesting backstories. I liked how the past and modern-day storylines both featured great female side characters who helped move the story along in their own distinctive ways. This includes the socially awkward intelligence officer Julie Marquez, from the original Golf Sierra mission, and Indian tech guru Priyanka Bandari, who Gentry is forced to work with after saving her from kidnappers. Both female characters add to the plot a great deal, and it is fascinating to see events unfold from their eyes, especially as they have diverse life experiences and are also seeing very different versions of the protagonist. The storylines around both women are written extremely well, and I really appreciated where both went, especially as they both included tragedy, regret and definitive action. I also must really highlight the use of long-running supporting character Zack Hightower, who was an excellent inclusion in the historical storyline. Zack is always a great foil to Gentry, and I really enjoyed seeing him interact with the younger, cockier version here, especially as it shows some of the earlier dynamics between them. Watching Gentry meet his mentor and friend for the first time was great, and I really enjoyed the cool storyline that developed between them and the other members of the Golf Sierra kill team. All these characters were extremely impressive and I had a brilliant time getting to know them throughout the course of Sierra Six.

While I did receive a paperback version of Sierra Six, I went out of my way to also get this novel on audiobook as I have had some awesome experiences with the Gray Man books in this format before. This proved to be an excellent decision as the Sierra Six audiobook was amazing, perfectly telling the cool story while enhancing the intriguing tradecraft and action elements. The Sierra Six audiobook has a run time just short of 16 hours and so requires a bit of a time investment to get through it, although I think this was more than worth it and dedicated listeners should be able to get through rather quickly. I was also very happy to see that this audiobook once again featured the vocal talents of Jay Snyder, who is one of my favourite audiobook narrators at the moment. Snyder has a gruff and distinctive voice that fits the harder spy thriller feel of this novel perfectly and drags the listener into the intense tale. Snyder does a brilliant voice with all the characters featured within, and you get a good sense of their various emotions and feelings, especially during some of the more action-packed sequences. I had an outstanding time listening to this audiobook and it is an excellent format for anyone interested in trying out this latest Gray Man novel.

The always impressive Mark Greaney has done it again, producing an incredible and exciting new Gray Man novel. Sierra Six, features a bold and captivating story that cleverly utilises two distinctive timelines to tell its intense and moving tale. Loaded with fun character, brutal action sequences, and some intriguing espionage moments, this was another outstanding book I had a brilliant time reading. Sierra Six comes highly recommended from me and I cannot wait to get my hands on the next Greaney book.

Amazon Book Depository

Relentless by Mark Greaney

On March 15, 2021February 2, 2023 By The Unseen LibraryIn Audiobook, Five-Star Books, Thriller36 Comments

Publisher: Sphere/Audible Audio (Audiobook – 16 February 2021)

Series: Gray Man – Book 10

Length: 15 hours and 39 minutes

My Rating: 5 out of 5 stars

Amazon Book Depository

One of the leading authors of the spy thriller genre, Mark Greaney, returns with the tenth epic book in his long-running Gray Man series, Relentless, an impressive and captivating read.

Mark Greaney is talented author who has been absolutely killing it over the last 10+ years ever since his 2009 debut. While he has written some other books, including seven contributions to Tom Clancy’s iconic Jack Ryan universe (three cowritten with Clancy, and four written after Clancy’s death) and the military thriller Red Metal (cowritten with Hunter Ripley Rawlings, and one of my favourite books and audiobooks of 2019), Greaney is probably best known for his awesome Gray Man series. Starting with The Gray Man in 2009, this series follows Court Gentry, a disavowed CIA operative turned assassin known as the Gray Man. I am a major fan of this series, having read the last few entries, Mission Critical and One Minute Out (the latter was one of my favourite books and audiobooks of 2020), and I have been looking forward to this book for a while (indeed it was one of my most anticipated releases for 2021).

Around the world, several top intelligence agents are disappearing, and CIA deputy director Matthew Hanley wants to know why. When a former American agent who was believed to be dead resurfaces in Venezuela under the protection of the local secret police, Hanley has no choice but to send in his most dangerous asset, Court Gentry, the Gray Man. As the Gray Man, Gentry is feared around the world as a lethal assassin and rogue operative, but his real role is as a deniable hitter for Hanley at the CIA. Journeying down to Venezuela, Gentry makes contact with the former agent, who spins a tale of conspiracy and espionage in the heart of Europe before being brutally murdered by a heavily armed team of assassins.

Barely managing to escape with his life and convinced of a larger conspiracy at foot, Gentry convinces Hanley to send him to Berlin to uncover the truth. At the same time, Gentry’s fellow CIA agent and lover, Zoya Zakharova, is infiltrating a private German intelligence firm with connections to the dead man in Venezuela. As Zoya attempts to find out who is really running the organisation, she finds herself once again in the crosshairs of her former masters in Russian intelligence, who send their most lethal assassin to kill her.

As Gentry and Zoya fight for their life in Berlin, they start to understand the full breadth of the conspiracy they have found themselves amid. Someone is playing a dangerous game at a global level and they are willing manipulate the American and European governments to further their goals. Can Gentry and his allies get to the bottom of this conspiracy before it is too late or will a terrible attack lead America into an unwinnable war?

The hits keep on coming from Greaney, as Relentless was a fantastic and incredible novel that is one of the best books of 2021 so far. I loved the impressive and complex story contained within Relentless with all its twists and turns, and I swiftly became enthralled by the well-written and intense narrative. I had an outstanding time reading this book and it gets an easy five-star rating from me.

At the heart of this awesome novel is an intense and fast-paced narrative that readers will quickly become addicted to. Set shortly after the events of One Minute Out, this multi-perspective narrative sends protagonist Court Gentry to South America on a dangerous mission that has connections to the main conspiracy. After a not entirely unexpected destructive fire fight from a third party, Gentry heads to Europe where he seeks to back up his love interest, Zoya, who is undercover in Berlin following another connected lead. At the same time, the narrative expands out to showcase other groups involved in the conspiracy, including a manipulative spy master, two separate teams of killers who are hunting different protagonists, and an Iranian sleeper agent, just to name a few. All their various storylines and character arcs are extremely interesting and exciting, as the author has crafted together some compelling narratives for each of them. Greaney throws in a lot of amazing surprises and twists throughout the novel, and while I was able to guess how a few things were going to turn out, I could not predict the amazing scale and complexity of the overarching conspiracy that the characters find themselves involved with. There is a comprehensive and captivating focus on international espionage throughout Relentless which fits into the story perfectly, and I loved all the cool details that author included, including a recreation of a recent real-life espionage event of great significance. All these storylines come together extremely well, ending with a massive and memorable conclusion that was a lot of fun, and I ended up loving every second of this cool story. Greaney also sets up some intriguing storylines for future novels in the series and I am really looking forward to seeing what happens next.

In addition to Relentless’s epic story, I really enjoyed Greaney’s cool writing style, which complemented the narrative perfectly. The novel can be easily enjoyed by people unfamiliar with the series, and I really appreciated the amazing amount of detail and excitement loaded into the book. There a particular focus on trade craft with this latest novel, with some great explanations about the various spy techniques utilised by the various characters, and this pumped some real authenticity into the story. I also really enjoyed all the incredible action sequences featured within this latest novel. Greaney has always had a talent for writing explosive and powerful action scenes, and Relentless contains some impressive examples of this as the protagonists duke it out with a wide range of enemies across the world. Every action scene is well-planned out, realistic and very intense, ensuring the reader is constantly on the edge of their seat.

I also absolutely loved the author’s excellent use of multiple perspectives throughout the novel, which was a real highlight for me. While there is an obvious focus on characters like Gentry and Zoya, nearly every other character, including many of the antagonists, have their side of the story shown. I found this worked extremely well to tell a complex narrative, as the reader gets to see what everyone, from the mastermind of the conspiracy to members of the various kill teams hunting the protagonists, is doing and thinking. Not only does this build up suspense, as you know in advance some of the dangers and threats coming towards the protagonists, but you also get to see the antagonists react to all of Gentry’s actions and watch them adjust accordingly. This makes for a much richer and more impressive story, and it works particularly well in some of the combat sequences, as you get to see all the characters manoeuvring around the battlefield. There are also some extremely awesome chapters where various characters are following each other throughout Berlin. Watching several point-of-view characters engaging in surveillance and countersurveillance operations against each other, with some other interested parties thrown in for good measure, was very cool, and it ended up being one of the cleverest sequences in the novel. I really loved how this awesome writing style enhanced the story and I think it worked really well.

As usual, Greaney comes up with an excellent selection of characters for Relentless, all of whom get explored in substantial detail throughout the book. Most of Relentless’s focus is naturally on the series’ main protagonist, the titular Gray Man himself, Court Gentry. Greaney continues to paint an interesting figure with Gentry, as a former official CIA operative who was forced to become an assassin with a conscience, before secretly re-joining the CIA in the Poison Apple program as a deniable asset. Gentry has a great, action-packed story in Relentless, getting into all manner of dangerous situations, and I loved the cool ways he attempts to extricate himself from them, often by killing his opponents. I also really liked how Greaney gave Gentry a significant handicap in this latest adventure, as he is suffering from a serious infection from a stab wound gained in One Minute Out. This infection reduces his reaction speed and physical prowess throughout the book and forces him to seek continued medical care, all of which makes his mission even more dangerous and problematic, and which really raises the stakes for the entire book. It was also great to see more of Zoya and Zack Hightower, the other two Poison Apple agents, both of whom were not featured that much in the previous novel. Both these agents have some compelling and entertaining arcs in this book, and I always enjoy how well the former Russian knockout and the aging American special operator compliment Gentry as a team. Interestingly, you also get to see a lot more of CIA deputy director Matthew Hanley, the man secretly running Gentry, as he even gets into the field for a particularly dangerous assignment. Some big moments occur for Hanley in Relentless, and it will be interesting to find out what happens to him next. I also quite enjoyed the wild Russian assassin, Maksim Akulov, a drunk lunatic with a death wish, who is assigned to kill Zoya, but eventually starts targeting Gentry, seeing him as the ultimate challenge. All these amazing characters, and more, really added a lot to the story, and I look forward to seeing how the ones who survived are utilised in the future.

While I did receive a physical copy of Relentless, I ended up enjoying this book in its audiobook format instead. I have had a lot of fun with Greaney’s audiobooks in the past and I generally find that the intense and epic action and espionage translates into this format extremely well. Relentless was no exception, and I found myself really enjoying listening to all the cool sequences unfold and at times I almost felt like I was there witnessing it. With a run time of 15 hours and 40 minutes, Relentless’s audiobook is pretty long and might take listeners a while to get through. However, it is worth the time investment and you will find yourself quickly powering through it once you get caught up in the story (I personally listened to it for nearly five hours straight at one point). This latest Gray Man audiobook also sees the return of Jay Snyder as narrator. Snyder is an experienced and prolific audiobook narrator who has contributed his voice to a wide range of awesome audiobooks in the past, including all the previous entries in the series. Snyder has a fantastic gruff voice that fits the tone of Relentless perfectly, and which he uses to great effect moving the story along and describing all the deadly action and chaos. Snyder also produces some great voices for the various characters which I think encapsulate each person really well and proved to be very effective. I was a little wary about a Minnesota accent that he had to do for one of the characters, but it grew on me as the book progressed and I think it was a decent attempt in the end. All of this makes for an epic and enjoyable audiobook and this is definitely an amazing way to check Relentless out.

Relentless is another exceptional spy thriller from the always impressive Mark Greaney that comes very highly recommended. The 10^th entry in the always outstanding Gray Man series, Relentless contains another captivating and deeply exciting narrative, which, combined with Greaney’s impeccable writing and fun characters, makes for a truly excellent thriller. I had such an awesome time reading Relentless, and this book is one of the best releases of 2021 so far. I look forward to seeing how Greaney continues this series in the future, and I must really go back and check out some of the earlier Gray Man novels this year, especially as a movie adaption of The Gray Man is currently being made by the Russo brothers with Ryan Gosling and Chris Evans set to star (I mean, talk about a movie with some real potential).

Amazon Book Depository