I'm a coward. I can't watch horror movies and have trouble with horror games, but sometimes enjoy hearing about the lore. This meant no Five Nights at Freddy's for me, until now. Scott Cawthon is working on a Five Nights at Freddy's book.
Five Nights at Freddy's: The Untold Story was revealed via an image on his website. It said that the untold story was coming soon. Said image is called, "FNAF_TheNovel.jpg."
As for when we'll see Five Nights at Freddy's: The Untold Story, it could be right around the corner. People who inspect the website can find information in the coding that says the book will be, "coming to Amazon Kindle, very soon." Hopefully we'll be able to find it at other online distributors too!