Crazy Dangerous — Andrew Klavan

"You probably want to hear about Jennifer and the demons and how I played chicken with a freight train and-oh yeah-the weird murder . . . you're definitely going to want to hear about that."

Sam Hopkins is a good kid who has fallen in with a bad crowd. Hanging around with car thieves and thugs, Sam knows it's only a matter of time before he makes one bad decision too many and gets into real trouble.

But one day, Sam sees them harassing an eccentric schoolmate of his named Jennifer. When Sam finds the courage to face the bullies down, he loses a bad set of friends and acquires a very strange new one.

Because Jennifer is not just eccentric. To Sam, she seems downright crazy. She has terrifying hallucinations involving demons and the devil and death. And here's the really crazy part: Sam is beginning to suspect that these visions may actually be prophecies-prophecies of something terrible that's going to happen very soon. Unless he can stop it.

With no one to believe him, with no one to help him, Sam is now all alone in a race against time. Finding the truth before disaster strikes is going to be both crazy and very, very dangerous.