Since the publication of "The Hunt for Red October", Tom Clancy established an unrivalled position as the world's leading thriller writer, with a string of million-selling novels and three major Hollywood films to his name. He was also the author of "SSN" and the non-fiction books "Submarine, Armoured Warfare, Fighter Wing and Marine", and the co-creator of the Op-Centre series.

In addition to his New York Times bestselling collaborations with Clive Cussler and Tom Clancy, Grant Blackwood is the author of three novels featuring Briggs Tanner: The End of Enemies, The Wall of Night, and An Echo of War. A U.S. Navy veteran, Grant spent three years as an operations specialist and a pilot rescue swimmer. He lives in Colorado.