Series · thriller
The Gray Man
The Gray Man series by Mark Greaney has 15 books and is best read in publication order, starting with The Gray Man (2009). The next book, Dark Union, is due 16 February 2027.
- Books
- 15 books
- First published
- 2009
- Status
- ongoing
- Last checked
Start here: The Gray Man (2009) — then read straight through in publication order.

Reading order
The order the books were released — the default way to read the series.
- Book 1:
The Gray Man
Alternative text for cover: Cover of The Gray Man - Book 2:
On Target
Alternative text for cover: Cover of On Target - Book 3:
Ballistic
Alternative text for cover: Cover of Ballistic - Book 4:
Dead Eye
Alternative text for cover: Cover of Dead Eye - Book 5:
Back Blast
Alternative text for cover: Cover of Back Blast - Book 6:
Gunmetal Gray
Alternative text for cover: Cover of Gunmetal Gray - Book 7:
Agent in Place
Alternative text for cover: Cover of Agent in Place - Book 8:
Mission Critical
Alternative text for cover: Cover of Mission Critical - Book 9:
One Minute Out
Alternative text for cover: Cover of One Minute Out - Book 10:
Relentless
Alternative text for cover: Cover of Relentless - Book 11:
Sierra Six
Alternative text for cover: Cover of Sierra Six - Book 12:
Burner
Alternative text for cover: Cover of Burner - Book 13:
The Chaos Agent
Alternative text for cover: Cover of The Chaos Agent - Book 14:
Midnight Black
Alternative text for cover: Cover of Midnight Black - Book 15:
The Hard Line
Alternative text for cover: Cover of The Hard Line
About The Gray Man
Court Gentry — the Gray Man — is a disavowed former CIA black-ops asset who now works as one of the world's most sought-after freelance assassins, taking on jobs (and increasingly, off-book missions for old CIA handlers) that pit him against rival intelligence services, cartels, private military contractors and other elite killers. Mark Greaney writes brutally kinetic, tradecraft-heavy action that unfolds in real geopolitical hotspots, and the series has only gotten bigger in scope as it's gone on: later books put Court up against near-peer state actors (Russia, China), give him a long-running partner and love interest in Russian intelligence officer Zoya Zakharova, and dig into his own past as a CIA-trained killer.
Greaney, who co-wrote several Tom Clancy continuation novels before and during this series, brings the same research-heavy, weapons-and-tactics-accurate style to Court Gentry's story, which began with The Gray Man in 2009 and became a mainstream hit after the 2022 Russo brothers film adaptation starring Ryan Gosling introduced the character to a much wider audience. Released on an annual February cadence for over a decade, the series is a good fit for readers who want their spy-thriller violence relentless, their protagonist morally gray, and their tradecraft convincingly researched.
How to read this series
Publication order, starting with The Gray Man (2009). The series builds a continuous story — Court Gentry's relationships (especially with Russian operative Zoya Zakharova, who becomes central from Relentless onward), his standing with the CIA, and the consequences of earlier missions carry forward book to book — so this isn't a series to jump into at random the way some thriller series are.
There's a real gap in the timeline: after Ballistic (2011) the next novel, Dead Eye (2013), skips ahead, and the series then goes on hiatus in-story before resuming its now-annual February schedule with Back Blast (2016). No numbered novellas or side-story spinoffs exist in the main line — just the 15 full novels — so publication order is also the only order.
Frequently asked questions
How many Gray Man books are there?
There are 15 Gray Man novels as of The Hard Line (2026), with a 16th, Dark Union, due 16 February 2027.
What order should I read the Gray Man books in?
Publication order, starting with The Gray Man (2009). The series is continuous — Court Gentry's relationships and CIA standing carry forward from book to book.
Is the Gray Man movie based on the books?
Yes. The 2022 Netflix film The Gray Man, directed by the Russo brothers and starring Ryan Gosling, is a loose adaptation of Greaney's first novel, with reported changes to plot and characters.
Do I need to read the Gray Man books in order?
Yes, more than most thriller series. Court's evolving relationship with Zoya Zakharova, his fractured ties to the CIA, and fallout from earlier missions are ongoing threads best followed in sequence.
When is the next Gray Man book coming out?
Dark Union, the 16th Gray Man novel, is scheduled for release on 16 February 2027.
Reading order last verified .












