JUMP is a tale of combat, sex, PTSD, and alienation. Gage Roberts is a man adrift, caught up in bad war memories as he tries to regain his emotional footing. Si Dunn is a screenwriter, movie producer, book author, book review columnist, blogger and photojournalist. He served in the Navy in the Tonkin Gulf and South China Sea during the Vietnam War. He is a graduate of the University of North Texas and has worked for several newspapers and other publications. His previous books include The Everything Online Auctions Book (Adams Media) and First Team (Taylor Publishing). He lives in Austin, Texas.