JAMES ROLLINS is the New York Times bestselling author of international thrillers, translated into more than forty languages. His Sigma series has been lauded as one of the "top crowd pleasers" (New York Times) and one of the "hottest summer reads" (People magazine). In each novel, acclaimed for its originality, Rollins unveils unseen worlds, scientific breakthroughs, and historical secrets--and he does it all at breakneck speed and with stunning insight. 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.