Every fall in northern Michigan brings a spate of dogman sightings. A radio DJ's invention, the dogman was created as an attention-getting joke. But millions of Michiganders believe in angels and vampires, werewolves, Bigfoot . . . and the dogman. Late summer, the horribly mutilated bodies of two Native American girls are found in a tent in a remote campground in the Huron Mountains. Grady Service, who wants nothing more than to return...