In his research for the Gray Man novels Mark Greaney has traveled to more than thirty-five countries and trained alongside military and law enforcement in the use of firearms, battlefield medicine, and close-range combative tactics. 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.
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 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 Hard, fast, and unflinching-exactly what a thriller should be. -Lee Child, #1 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 The latest in the Gray Man series continues to demonstrate why Greaney belongs in the upper echelon of special-ops thriller authors. -Booklist (starred review) The action is almost nonstop, with nice twists right to the end...This is good, Clancy-esque entertainment. -Kirkus Reviews Mark Greaney continues his dominant run. -The Real Book Spy Mark Greaney is truly a master of his genre. -Manhattan Book Review