Marc Rainer is the pen name of Charles (Chuck) Ambrose. Chuck is a graduate of the United States Air Force Academy and is a retired Assistant United States Attorney and USAF JAG with over three decades of experience in prosecuting federal trials. He has tried mafia cases, murder cases, and conspiracy cases, and was recognized in his field as an expert in the management of complex investigations. He often weaves real-life investigative events and actual trial transcripts into the pages of his books. As a result, his novels in the Jeff Trask Crime Drama series have been hailed by those in law enforcement and the legal profession as models of realism. His books are contemporary historical novels, tapping into real-world issues and current events.