It is based on the controversial novel American Psycho (1991) by Bret Easton Ellis.

In the novel American Psycho, Patrick Bateman mentions trying to start a defense fund for Chambers.

Robert Bloch himself, the author of the novel Psycho, has stated in an interview that his all-time favorite horror film is Diabolique.

The film is notable for a script penned by author Robert Bloch, author of the novel Psycho.

Title name came from the starring character off the novel American Psycho.

In February 2010, he was announced to write the book for the musical adaption of the novel American Psycho.

Remember the outrage over the novel 'American Psycho'.

There were so many opportunities to reject Bret Easton Ellis's novel "American Psycho."

In 1959, the novel Psycho was published.

In the Psycho II novel, there are no mentioned plans of releasing Norman from the institution.