Roger Guay served with the Maine Warden Service from 1986 until his retirement in 2010. He is a K9 master trainer, a certified K9 handler, and certified in cadaver and explosives searches. In addition to decades of search and rescue experience, he has extensive experience in missing persons/homicide searches and body recovery. Guay has received numerous commendations from the warden service; the Maine House of Representatives; the Maine State Police; the Miramichi, New Brunswick, police; and the USPCA. Guay lives in Guilford, Maine.

A GOOD MAN WITH A DOG was written with Kate Clark Flora:

Kate Clarke Flora has published fourteen mystery and true crime books. Her titles include Finding Amy, an Edgar Award nominee, Death Dealer, an Agatha and Anthony finalist and 2015 Public Safety Writers Association Award-winner for Best Non-fiction, Grant You Peace, a Joe Burgess police procedural and winner of the 2015 Maine Literary Award for Crime Fiction, and the Thea Kozak mysteries. A former Maine assistant attorney general, Kate lives in Harpswell, Maine.