T. R. HENDRICKS is a former United States Army Captain who served as a tank platoon leader, and then as a military intelligence officer, where he was an advisor to the Iraqi Ministry of Interior's National Information and Intelligence Agency. When not working or writing in his home in upstate New York, Hendricks is most likely reading, woodworking, or watching his beloved San Francisco 49ers. The Instructor is his first novel. "The Instructor is an unexpected pleasure, crackling with intensity, vivid with authenticity and emotion. T.R. Hendricks writes like a knife fight on a moonless night—fast, brutal, and bloody." —Nick Petrie, bestselling author of The Breaker and other Peter Ash novels "Gritty, timely, and packed with action, The Instructor is a pulse-pounding thriller and a fabulous start to the Derek Harrington series. T.R. Hendricks delivers on all cylinders!" —Simon Gervais, former RCMP counterterrorism officer and bestselling author of The Last Protector "Thrumming with action and authenticity, Hendricks knocks it out of the park with his debut. The Instructor is not to be missed!" —Connor Sullivan, author of Sleeping Bear "The Instructor, by T.R. Hendricks, is a brilliant debut by an author who obviously knows his stuff! Derek Harrington is a terrific new hero, a former Marine and wilderness survival expert who finds himself in a battle of wits against both a determined enemy and nature itself. Packed with action, tension, and humanity, The Instructor delivers." —Mark Greaney #1 NYT bestselling author of Burner, a Gray Man Novel