Mark Greaney has a degree in international relations and political science. In his research for the Gray Man novels he has travelled to more than fifteen 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 seven New York Times Tom Clancy bestsellers, including three written with Clancy: Locked On, Threat Vector, and Command Authority.
Hard, fast, and unflinching - exactly what a thriller should be - Lee Child on The Gray Man Mark Greaney's The Gray Man is Bourne for the new millennium - James Rollins A high-octane thriller that doesn't pause for more than a second. For readers looking for a thriller where the action comes fast and furious, this is the ticket - Chicago Sun Times on The Gray Man The exemplary Gray Man series - Publishers Weekly Somehow, Greaney cranks out one winner after another. That's a lot of work for the Gray Man and plenty of pleasure for thriller fans - Kirkus