William C. Dietz is the bestselling author of the Mutant Files novels, the Legion of the Damned series, HALO: The Flood and Hitman: Enemy Within, and numerous other science fiction novels. He served as a medic with the navy and the Marine Corps, and worked as a surgical technician, news writer, television producer, and director of public relations for an international telephone company prior to writing full-time. He lives in Washington.