Cold Fire (Supernatural Book 10‪)‬

When a gruesome murder takes place in Braden Heights, Indiana, the authorities suspect the disembowelled and eyeless corpse was the victim of an animal attack. But when another body is discovered, eyes gouged out, Sam, Dean and Castiel start looking for connections between the two men and learn they were both soon to be fathers. As the boys hunt the killer, they unearth the town's troubled past, and secrets some would prefer stay buried forever.