Mr. Monster
Mr. Monster is a young adult horror novel by Dan Wells, published in 2010 by Tor Books and by Headline. John Wayne Cleaver saved his town from a murderer even more appalling than the serial killers he obsessively studies. But it turns out even demons have friends, and the disappearance of one has brought another to Clayton County. No one in Clayton is safe unless John can vanquish two nightmarish adversaries: the unknown demon he must hunt and the inner demon he can never escape.