National Bestselling Author of on Target and The Great Man
Mark Greaney is the #1 NYT Bestselling coauthor of Command Authority. He is the author or coauthor of 5 Tom Clancy novels. He is also the author of The Gray Man series, of which Columbia pictures is developing the film adaptation for The Gray Man. In research for his novels, Mark has traveled to over fifteen countries, visited the Pentagon, and trained alongside military and law enforcement.