American Psycho by Bret Easton Ellis

The novel is a disturbing and graphic exploration of the mind of a wealthy, young and handsome Wall Street investment banker who is also a psychopathic serial killer. He leads a double life, appearing to be a charming and sophisticated businessman by day, while indulging in horrific acts of violence and murder by night. The narrative provides a satirical critique of 1980s American consumer culture, vanity, and excess, while also delving into the dark underbelly of human nature.

The 499th greatest book of all time