“Mark Greaney knows how to bring it,”

“and he brings it big time in Relentless…[it] resembles a Hollywood action mash-up in all the right ways…Greaney blends the brawn of Brad Thor with the brains of Daniel Silva, crafting a thriller extraordinaire that readers will devour, not just read.”–

the providence journal

“Vivid action scenes…”

“this is still a must for espionage thriller fans.”

publishers weekly

“Hard, fast, and unflinching–exactly what a thriller should be.”

Lee Child, #1 New York Times bestselling author

“Never has an assassin been rendered so real yet so deadly.”

“Strikes with the impact of a bullet to the chest…not to be missed.”

james rollins, new york times bestselling author

“Writing as smooth as stainless steel and a hero as mean as razor wire…”

“The Gray Man glitters like a blade in an alley”

david stone, new york times bestselling author

“Mark Greaney is truly a master of his genre.”

manhattan book review

“The action is almost nonstop, with nice twists right to the end…”

“This is good, Clancy-esque entertainment.”

kirkus reviews

“The latest in the Gray Man series continues to demonstrate why Greaney belongs in the upper echelon of special-ops thriller authors.”

booklist

“At the start of bestseller Greaney’s solid 10th Gray Man novel (after 2020’s One Minute Out), CIA operative Zach Hightower is trailing his target, a traitorous former NSA computer scientist, in a Caracas marketplace when he’s grabbed by thugs from Venezuela’s intelligence service. On learning of the failed mission, the CIA deputy director for operations rousts Zach’s partner, CIA contract killer Court Gentry (aka the Gray Man), from his hospital bed, where he’s recovering from a chest wound, and sends him to finish the job. Gentry takes on a long list of bad guys, including a group of American mercenaries working for the spy organization of the United Arab Emirates, a rogue international intelligence firm, and a Russian superagent who may be the only assassin in the world who could go one-on-one with Gentry and come out on top. Readers won’t be wrong to suspect that Gentry, despite being at half strength, will prevail. Vivid action scenes more than make up for a complicated plot that can be hard to follow at times. Though short of Greaney’s best, this is still a must for espionage thriller fans.”

publishers weekly

Relentless
CHAPTER ONE

Templeton 3 Annex is almost impossible to find if you don’t already know about it. Nestled deep in a sterile office park in an unincorporated stretch of Prince George’s County, Maryland, just a few minutes south of Joint Base Andrews, the front door simply reads: Palmer Holdings, LLC.

But there was no Palmer, there were no holdings, and the office space behind the door housed no limited liability company.

Templeton 3 Annex is the bland code name for a clandestine medical facility run for personnel of CIA black operations, those deemed too covert for regular medical care, and not only was Templeton 3 physically hard to find, even deep within CIA operations, only a very few knew about it at all.

No one had ever come through the door to Palmer Holdings accidentally, but if someone had they would have been turned away by the pair of men in nondescript security guard uniforms sitting behind the desk. A well-trained eye might be curious as to why men so obviously young and fit would be working the security D-list here in an out-of-the-way office park, but a visitor would get no farther into the building without passing the pair-and the Heckler & Koch MP7 Personal Defense Weapons they kept out of sight but within reach.

But at four fifty a.m. on a rainy Tuesday in August, someone with the right credentials did come through the door, and he stepped up in front of the two guards. Though surprised by both the time of the visit and the identity of the visitor himself, they disengaged the electronic lock to a door, which the large man in the dripping raincoat passed through. Here he encountered another pair of guards sitting in a snack room guarding yet a third door. After an okay radioed by the lobby crew, the lunchroom team asked the visitor to put a hand on a scanner, and then, when the locks popped open, the men escorted the visitor down a wide staircase and into the basement of the four-story building.