American Psycho is a musical with music and lyrics by Duncan Sheik and a book by Roberto Aguirre-Sacasa. It is based on the controversial 1991 novel American Psycho by Bret Easton Ellis, which also inspired a 2000 film of the same name, which starred Christian Bale. Set in Manhattan during the Wall Street boom of the late 1980s, American Psycho is about the daily life of Patrick Bateman, a wealthy young investment banker.