The Werewolf Walks Tonight — Michael Avallone

“Fletcherville seems to have a wolfman, Sidney. A wolfman who's already killed four people. And there's a young girl who's disappeared. She may be dead by now. In any case, Fletcherville is calling. For me.” Philip St. George, The Satan Sleuth

Deacon Williams' corpse hung upside down from the limb of a gnarled juniper tree, his throat ripped out. Murder: brutal, vicious, inhuman… the work of a mad dog, a wolf, a monster. Was the legend of the Fletcherville Werewolf a reality? By the time whatever it was had killed again, and a beautiful girl had disappeared, Philip St. George decided to intervene. There was work once more for… the Satan Sleuth.

Satan Sleuth Series (5 novels, 2 unpublished):

Fighting for reason and right against the Devil and his disciples… Satan Sleuth is an occult adventure series about Philip St. George, a masked avenger fighting the forces of darkness in the 1970s.