Mark Greaney (Author) 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.
Lieutenant Colonel Hunter Ripley Rawlings IV (Author) Lt Col Hunter "Rip" Rawlings IV is an active duty Marine and a veteran of combat with over ten tours to Afghanistan (OEF), Iraq (OIF), Saudi Arabia and Northern Africa (OEF) to name a few. An Infantry and LAV Reconnaissance Officer by trade. A former company commander, FAST det. commander and an infantry battalion commander of the 3d Battalion, 5th Marines. Rawlings service to the Nation spanned more than twenty-two years of active duty. His last assignment was in Quantico Marine Base as the Warfighting Department Head for Marine Corps Command & Staff College. In his spare time, Lt. Col. Rawlings is an avid scuba diver, hunter, motorcyclist, rock drummer, small-craft sailor and microbrewer of fine beer.