Beneath the Neon Moon by Theda Black

Zach's alone, he's lost his job and the rent's coming due. He thinks he knows all about bad luck, but he's about to find out what it really means. In high school, Mal was the golden boy. Then he lost his way. Now he's back on track, working his way through college and looking toward the future. They've never met, but one summer night everything changes. They find themselves in desperate trouble, trapped and bound together in darkness. The moon is riding high and bright in the sky when Zach notices Mal's changing, growing volatile and wild. Suddenly Zach's got bigger things to worry about than being kidnapped―he's trapped with a man who's going wolf with the full moon.