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(Gray Man #10)

4.52  ·  Rating details ·  2,593 ratings  ·  219 reviews
The Gray Man's search for missing intelligence agents plunges him deep into a maelstrom of trouble in the latest entry in the #1 New York Times bestselling series.

The first agent disappearance was a puzzle
The second was a mystery
The third was a conspiracy

Intelligence operatives around the world are disappearing. When a missing American agent re- appears in Venezuela, Court
Kindle Edition, 496 pages
Published February 16th 2021
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Ian Greaney is way better than flynn who writes for insecure flag wavers, 2 dimensional writing with no real character development. Just some redneck with…moreGreaney is way better than flynn who writes for insecure flag wavers, 2 dimensional writing with no real character development. Just some redneck with a gun who always comes out on top. (less)
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Average rating 4.52  · 
Rating details
 ·  2,593 ratings  ·  219 reviews

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4.5 ⭐

I never thought I'll say this, but this book has way too much action. I'm writing this review with Russian accent in my head thanks to Jay Snyder.

In Relentless Court Gentry is working with a small CIA team; his old team lead Zack and former SVR (Russia Foreign Intelligence) agent, Zoya. Majority of the action took place in Germany. I love all the backstabbing in spy thrillers! It's never simple with so many players and each with their own agenda. This was a fun ride with a new villain revea
Chris  C - A Midlife Wife
I don’t know how he creates these intricate plots but they always keep me on my toes. Huge twists and plenty of action.
I don’t know how Greaney does it over and over. The intricate plots; the nonstop action; the highly detailed characters that work perfectly together. This story never lets up from the time you begin it to the big, fat suspended swivel at the end.

This story was a trip. There were so many twists and turns I honestly lost track of who was manipulating whom and what
Judy Lesley
The Poison Apple group of Court, Zoya and Zach are back working together whether Matthew Hanley of the CIA wanted it that way or not. Berlin is the main location where so much could go wrong and eventually it does. This book #10 in the Gray Man series is a thriller where almost everybody has two very different agendas they are running simultaneously. It's just one crisis, one assassins job, one political agenda and one international incident after another. By the end of this story it's hard to t ...more
Mojo Shivers
Feb 19, 2021 rated it it was amazing  ·  review of another edition
I once described the way the Gray Man books work, with the odd-numbered books being where Court works alone on personal missions and even-numbered books being CIA assignments with his other teammates in Poison Apple, as being akin to a lawyer taking on pro bono cases between his normal cases for his firm. I honestly don’t know which I like better. The solo missions tend to be more tense and nerve-wracking, knowing he doesn’t have the full resources of the CIA to rely on. But the team missions te ...more
Feb 16, 2021 rated it really liked it
Shelves: crime-mystery
I love the Gray Man series. This is #10 and it did NOT disappoint. I liked that the MC is still a bit of loner given his profession, but he so wants to have more. That tug and pull is something most people can relate to. The author keeps Court tethered nicely to his world with a bit of normalcy.

The other characters are also anchored in and they had strong roles which kept the plot rolling along at a steady pace. I like that they are equal to the task. I liked Zoya and Zack. They had some great
J Todd wilkins
Nov 30, 2020 rated it it was amazing  ·  review of another edition
Relentless is a word that can easily describe both the protagonist and the author who brings him to life on the page.

In his 10th Gray Man novel, MARK GREANEY does not disappoint and has crafted another high paced, actioned pack thriller that keep readers engrossed in the increasingly dire circumstances Court Gentry and his team finds themselves in.

RELENTLESS takes us from the outskirts of Caracas to the very heart of power in Germany, with stops across the Middle East.

Still recovering in a CIA
One of my favorite reads of 2020 was Back Blast which was Gray Man #5, and the reason was I thought it was a great end to the first 5 book arc in the series and tied up some awesome loose ends that had been running through the series. I was wondering if we would get something similar for book 10, and I think we did but in a different way that makes it just as good.

Beware the following might have some mild spoilers for books 1-9 of The Gray Man series.

When I started on Gray Man book 6 I kind of g
Feb 20, 2021 rated it it was amazing  ·  review of another edition
I'm a big fan of espionage/action books and this series continues to deliver. Ten books in, I think, and the circumstances have changed but the writing is outstanding and the adventure remains first-rate. ...more
Feb 23, 2021 rated it liked it
An okay read, but one of my least favorite in the series, for various reasons. The CIA is portrayed as gullible, naive idiots. Greaney pulled out all the stops, replaying his favorite tropes: The Gray Man is injured, very sick, yet fighting strong against crazy odds. Suzanne Brewer is conniving — as we know from several previous books illustrating her malicious murderous deeds, but deputy director Matt Hanley is too stupid to see it. Court and Zoyah/ Anthem should know by know that she’s a liar. ...more
Jan 27, 2021 rated it really liked it
Shelves: arc
I have read Relentless by Mark Greaney. It's the latest in the series about Court Gentry aka Gray Man. This was one of the best books so far, it is almost non stop action and troubles all the way through. With an ending like this I can't wait to see what will happen in the next one. The power game within CIA is getting serious and so does the betrayal as well. I highly recommend this series. I must thank Mark for writing it and #Berkley , #PenguinPublishingGroup and #Edelweiss for giving me this ...more
Stuart Ashenbrenner
READ MY FULL REVIEW AT Best Thriller Books

With the superb writing the Greaney has continuously produced, he has crafted Gentry in the perfect weapon and delivered realistic, pulse-pounding plots that make the pages fly by all too quickly.

Make sure to check out the full review
Nov 22, 2020 rated it it was amazing  ·  review of another edition
Relentless, the new Gray Man book from Mark Greaney, is exactly that. Relentless. Relentless can be used to define Court Gentry's personality as well as the pacing of the book. The plot is complex but never feels out of touch. Court rates near the top of the list as a badass, beating out many other badasses. Court has a few friends show up to help him from earlier books, which he needs more than a few times. One of my favorite series, Mr Greaney knows how to write a thriller and Relentless is no ...more
Feb 17, 2021 rated it it was amazing  ·  review of another edition
Shelves: favorites
I'm kind of at a loss with where to start this review. Relentless - Book 10 in the Gray Man Series - really knocks it out of the park. Let me say, first of all, that this is one of my all time favorite series...ever. That is a big statement from someone who reads as much as I do.

There is something that captured me right at the beginning. There is just something about Courtland Gentry that pulls at you. You WANT him to succeed - even if the things he does are not things that you would ordinarily
RELENTLESS, the tenth in the Gray Man series by Mark Greaney, works as a stand alone thriller, but why would you want to miss out on the enjoyment of the series by reading only one book? I’ve read them all and while there are some weaker episodes, as a group it is difficult to find a more engaging and electrifying series. Our protagonist is back and forth, between life as a covert government sanctioned assassin and one operating by his own wits and ethics. Although, his government handlers might ...more
Minerva Conrad
I love the Gray Man, but this book was a more difficult read because of the timeline jumping around and the numerous foreign characters. It wasn’t until I was a third of the way in that the book finally picked up. Still a good read.
Donna Hines
Jan 18, 2021 rated it it was amazing
Shelves: arc, netgalley
To ponder the meaning of life you must get entrenched, soak up the sun, and find your way to the battle zone. Fight like hell! Get in their and fight!
This has some eerily reminiscent scenes that sadly remind me of our current Patriots as they which to be called trying to overthrow democracy at our Capitol.
However, I'll discuss the power of the drones and the explosives another time because there's more than shrapnel falling from the sky killing off those guarding the most important locations in
Kim Reads (Read Your Writes Book Reviews)
Reviewed by Gemini

Relentless is the latest book in Mark Greaney’s The Gray Man Series. Although I have not read all the books in the series, I have not been disappointed by the ones that I have read. Consequently, you don’t have to read all of the other books in the series to enjoy this one or any of the others based on my experience. The author always does a great job of providing enough background from the previous books so you never feel lost.

In this book, we find Courtland Gentry aka The Gr
Feb 25, 2021 rated it it was amazing  ·  review of another edition
This review has been hidden because it contains spoilers. To view it, click here.
Jean Kolinofsky
Feb 14, 2021 rated it it was amazing  ·  review of another edition
Court Gentry, the Gray Man, is a contract agent for the CIA who has become a legend in the field. Suffering from a life-threatening infection obtained from a knife wound, he heads to Berlin where fellow agent Zoya Zakharova is working under cover at Shrike, a private intelligence firm. Gentry has strong feelings for Zoya. While he has been forbidden from contacting her, he will provide backup, should she need it. Shrike has been providing surveillance on several Iranian sleeper agents for their ...more
James Winchell
Feb 23, 2021 rated it it was amazing
First of all I want to say it’s not a complete five star but it’s more then a four star. Mark Greaney delivers another solid book. I like how he used Berlin Germany for most of the story. Not a lot of going back and forth. Mark has done a great job with pairing Court, Zoya and Zack together giving each one there due. The suspense and action is spot on. Even though it is 512 pages it does not feel that way reading it. If you like Brad Thor Tom Clancy or Vince Flynn you have to pick up Mark Greane ...more
Feb 28, 2021 rated it really liked it
Shelves: year-2021
Is it only me or did this feel rushed? This entry into the Courtland Gentry Universe had all the ingredients that make the Gray Man so special but for some reason, it wasn't as explosive as it usually is for me. ...more
Paul Vogelzang
Feb 20, 2021 rated it it was amazing  ·  review of another edition
Another great one from Mark Greaney. Publisher sent me the book, but I always buy them, too. Love this author and will be interviewing Mark soon.
David C Ward
Feb 17, 2021 rated it liked it
A pretty good Nat Sec thriller but schizophrenic: The plot and geopolitics - a series of false flag operations out of the UAE to trigger a war between the US and Iran - are well worked but it gets bogged down with overly detailed descriptions of gun fights as well as the usual ordnance porn. (And also as usual, the good guys survive pretty brutal treatment without much consequences.) I suspect Greaney is smarter than he lets on and is writing down for the genre. The Robert Ryman/Gray Man allusio ...more
Bent Hansen
Feb 05, 2021 rated it it was amazing  ·  review of another edition
Shelves: netgalley, arc
[Review to follow ASAP]
Unseen Library
Mar 15, 2021 rated it it was amazing  ·  review of another edition
I received a copy of Relentless from Hachette Australia to review.

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.

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 p
Mike Kennedy
Thank you to @NetGalley for an advance copy of this book for an honest review. This is book number ten in the Gray Man series. It revolves around Court Gentry racing to Argentina to bring in a CIA asset thought to be dead, but really just gone rouge. Meanwhile, Zoya is in Berlin infiltrating a group that has ties to a rich benefactor. Court ends up in Berlin with Zoya as he tries to protect her while trying to figure out how his and Zoya’s missions are linked. To round things out the third wheel ...more
Shannon Wise
Feb 28, 2021 rated it it was amazing  ·  review of another edition
Shelves: spies, read-in-2021
Relentless. I have never come across a more apt title for a thriller. Relentless is just that from beginning to end. It is a pulse-pounding thriller that never lets up. Just when you think things are going to resolve, something new happens. Until the very end.

Zack Hightower (Court's former and current teammate) is sent to Venezuela to bring back a former NSA member who left with a program that can identify all spies. Zack is set-up, caught, and put in a Venezuelan prison. Court is recovering fr
SteVen Hendricks
Mar 01, 2021 rated it it was amazing  ·  review of another edition
Shelves: mark-greaney
Book Review - Mark Greaney’s 10th Gray Man novel is nothing more than a solid action-packed adventure with lots of espionage intrigue, the usual series suspects, plus plenty of new antagonists, and a really good setup for the next Gray Man installment. Relentless also had some nice progression in Court Gentry’s character without changing the overall tone of the series. While reading/listening to Greaney’s Gray Man series, I savor every word in every chapter. It’s like watching an action movie in ...more
Apr 09, 2021 rated it it was amazing
Shelves: favorites, my-books, owned
In sum, this was one of the best espionage-thrillers novels which I’ve read this year!! Mark Greaney has done a remarkable and masterful job at weaving intricate plot lines into one thrill ride that surpasses expectations.
Now with more characters involved in his GRAY MAN adventures, Mark Greaney has set the standard for all other thrillers. The era of the solitary rogue agent has expired and our contemporary hero must rely on the support and assistance of other people, people who can be trustwo
This review has been hidden because it contains spoilers. To view it, click here.
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Download PDF/ePub eBook Relentless (Gray Man) by Mark Greaney 1 5 Feb 11, 2021 09:24AM  

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Mark Greaney has a degree in International Relations and Political Science. In researching The Gray Man series he traveled to ten countries and trained extensively in the use of firearms, battlefield medicine, and close range combative tactics.


Email Mark at

Other books in the series

Gray Man (10 books)
  • The Gray Man (Gray Man, #1)
  • On Target (Gray Man, #2)
  • Ballistic (Gray Man, #3)
  • Dead Eye (Gray Man, #4)
  • Back Blast (Gray Man, #5)
  • Gunmetal Gray (Gray Man, #6)
  • Agent in Place (Gray Man #7)
  • Mission Critical (Gray Man #8)
  • One Minute Out (Gray Man, #9)

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