Suspiria. Photo: Amazon Studios

This post is updated frequently to reflect the latest movies to leave and enter Amazon Prime. *New additions are indicated by an asterisk.

Amazon Prime is one of the better streaming services for horror fans (and that’s even before you add on the essential Shudder service for a little extra blood and guts). Someone over at Amazon HQ is clearly a fan of the genre, because there are an unusually abundant number of quality films on the service that will make you double check that the doors are locked at night when you’re done watching. Here are the 40 best of them. Sleep tight.

*American Psycho

Mary Harron’s adaptation of the Bret Easton Ellis novel was instantly controversial — and instantly iconic. Christian Bale stepped into the role of the serial killer that had caused an uproar in the literary world and redefined the way we see psychopaths in cinema.

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