EXCLUSIVE: See the Cover for Mark Greaney’s 10th Gray Man Thriller, ‘Relentless’ (with Details)

On February 16th, 2021, Court Gentry returns to action in Relentless, the next Gray Man thriller from #1 New York Times bestselling author Mark Greaney.

Gentry, who was last seen in One Minute Out, which shot to the very top of the New York Times list back in February, continues to go toe-to-toe with bad guys, stacking bodies faster than just about anyone else in the genre. Last time out, Court took on a human trafficking ring. This time around, he’ll be working with the CIA to solve the mystery surrounding several operators who’ve suddenly gone MIA around the world. 

“When intelligence officers around the world begin disappearing, the Gray Man is sent to unravel the mystery,” said Greaney, who confirmed that his next book will not be in first-person POV (like One Minute Out) but rather told in third-person like his other novels.

“A missing spy turns up in Venezuela and leads Court Gentry in the direction of a shadowy organization based in Berlin at the center of a murderous plot to change the landscape of the Middle East by fomenting war between America and Iran. Court and fellow agents Zack Hightower and Zoya Zakharova must battle mercenaries, terrorists, spies, and assassins to their way towards the mastermind before the clock runs out.”

Check out the official plot details and cover art below.

RelentlessThe 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 Gentry, the Gray Man, is dispatched to bring him in, but a team of assassins has other ideas. Court escapes with his life and a vital piece of intelligence.

Meanwhile, CIA agent Zoya Zakharova is in Berlin. Her mission: to infiltrate a private intelligence firm with some alarming connections. The closer she gets to answers, the less likely she is to get out alive.

Court and Zoya are just two pieces on this international chessboard, and they’re about to discover one undeniable truth—sometimes capturing a king requires sacrificing some pawns.



Mark Greaney has a degree in international relations and political science. In his research for the Gray Man novels, including One Minute Out, Mission Critical, Agent in Place, Gunmetal Gray, Back Blast, Dead Eye, Ballistic, On Target, and The Gray Man, he traveled to more than fifteen countries and trained alongside military and law enforcement in the use of firearms, battlefield medicine, and close-range combative tactics.

With Marine LtCol Rip Rawlings, Greaney wrote the New York Times bestseller Red Metal. He is also the author of the New York Times bestsellers Tom Clancy Support and Defend, Tom Clancy Full Force and Effect, Tom Clancy Commander in Chief, and Tom Clancy True Faith and Allegiance. With Tom Clancy, he coauthored Locked On, Threat Vector, and Command Authority.

Readers excited to get their hands on Relentless can now pre-order Mark Greaney’s next novel here or anywhere else books are sold.



Praised as “One of the hardest working, most thoughtful, and fairest reviewers out there” by #1 New York Times bestselling author Lisa Scottoline, Ryan Steck has “quickly established himself as the authority on mysteries and thrillers” (Author A.J. Tata). Steck also works full-time as a freelance editor and pens a monthly thriller column for CrimeReads. For more information, be sure to follow him on Twitter and Facebook. He currently lives in Southwest Michigan with his wife and their six children.

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