Mark Greaney (Author)
Mark Greaney has a degree in international relations and political science. In his research for the Gray Man novels, including Relentless, One Minute Out, Mission Critical, Agent in Place, Gunmetal Gray, Back Blast, Dead Eye, Ballistic, On Target, and The Gray Man, he traveled to more than fifteen countries and trained alongside military and law enforcement in the use of firearms, battlefield medicine, and close-range combative tactics. With Marine Lt Col Rip Rawlings, he wrote the New York Times bestseller Red Metal. 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 co-authored 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.