Forsaken

Forsaken is told through short stories of different characters and their experiences with a knife wielding, masked, murderer. The killer is sadistic, and enjoys the pain, but also has sociopathic conditions, and cannot feel remorse when he murders. I read a lot of Stephen King, so it might sound similar to some of his books.

A few forewarnings before you read:
It does contain graphic scenes of violence
It contains references to sex, but no graphic descriptions
It contains references to drugs
It contains homosexual slang that might be offensive to some readers
It contains vulgar language that some readers might disturb or offend some readers.