The Great Detective: Will Cannon, Bounty Hunter, Western Adventure Novels, Book 58 (Unabridged‪)‬

Someone is murdering innocent people in Santa Fe and cutting an upside-down cross on the victims' foreheads. The town is in a panic as many people swear a devil worshipper is responsible for the murders. Davidson, the Great Detective from New York City, is in town and he is more of a problem than a help in solving the case. Will Cannon enlists the help of a young cowboy and together they try to track down Damon the Demon before he kills more innocent people.