From The Ritual to I Know What You Did Last Summer, ten famous horror movies that you probably forgot were based on equally ...

Consider yourself warned: You may be surprised by some of the entries on this list. Here are the 25 best horror movies based on true stories.

The Lansing bookstore is dedicated to true crime and horror books. Carpenter entered the world of horror as a "paranormal" tour guide with Demented Mitten Tours, a tour company based in mid-Michigan.