Jack Coughlin, a retired U.S. Marine gunnery sergeant, is the author, with Casey Kuhlman and Donald A. Davis, of the New York Times bestseller, Shooter: The Autobiography of the Top-Ranked Marine Sniper (St. Martin’s), as well as seven bestselling military thrillers featuring the Marine sniper Kyle Swanson. His next book, Shock Factor: American Snipers in the War on Terror, will be published by St. Martin’s in October. He lives with his two daughters in southern California.