Most of the Game theories you hear are in this book.

Little Sadie never knew the secret behind Freddy Fazbear's Pizzeria. She always thought the animatronics were the friendliest things she'd met since birth. But then came the bite. The Bite of '87. Little Sadie didn't understand why he did it, why he hurt that poor little girl. Sadie continued to visit Freddy Fazbear's Pizzeria, until her mother noticed red liquid coming from Freddy's eyes. After that, Sadie's mother never let her visit the animatronics again. On August 14th, 1999, 17 year old Sadie signed up to help Freddy Fazbear's Pizzeria. She was in charge of cleaning. As soon as the pen touched the contract, her whole life began to change.

4 animatronics. 5 nights. 6 hours = $120 Nothing could go wrong, right? (Brand new cover photo credits to somebody on Tumblr, thanks!)