Jeff the Killer: Go to Sleep (Insanity) (Volume 1)

Bullies and liars beware; your doom is near. Naomi Jansen just wanted a normal carefree life till she met Jeff, a laid back teenage boy with a dark secret. While Naomi is at camp she discovers one morning that her long time bully, Mallory, was found dead in her cabin. Naomi suspects Jeff, but decides that he's to sweet to do something like that; until a series of events changes her mind and her outlook on her own sanity.