I Hunt Killers by Barry Lyga

A young-adult thriller about Jasper "Jazz" Dent, son of imprisoned serial killer Billy Dent, who fears he has inherited his father's violent compulsions while a copycat killer—the "Impressionist"—murders women in his small town.

This book’s main concern’s are; animal cruelty, body horror, child psychological abuse, drugging, gore, grooming, horror, murder, mutilation, rape, sadomasochistic abuse, torture, and violence.