Charles W. Sasser has been a full-time freelance writer, journalist, and photographer since 1979. He is a veteran of both the U.S. Navy (journalist) and U.S. Army (Special Forces, the Green Berets), a combat veteran, and former combat correspondent wounded in action. He also served fourteen years as a police officer (in Miami, Florida, and in Tulsa, Oklahoma, where he was a homicide detective). He is author, co-author, or contributing author of more than thirty books and novels, including One Shot-One Kill and Hill 488. Sasser now lives on a ranch in Chouteau, Oklahoma, with his wife Donna.

Craig Roberts retired from the armed forces in 1999 with thirty years total service. He was awarded ten decorations for his Marine Corps service in Vietnam, where he served as a Marine sniper. He was also a career police officer with the Tulsa, Oklahoma, police department. An internationally published writer, he is the author of Combat Medic-Vietnam and Police Sniper, as well as the co-author of One Shot-One Kill, and The Walking Dead.