What a great idea! This item will surely create some great scares. Using some sort of motion detection technology this set of books slide around and make creepy noises when they sense a presence nearby.
Running off of 4 AA batteries, this animated bookshelf is definitely going to make for some hilarious YouTube videos. At only $25 for the set, this is a great item to have around the house for the upcoming holiday season.
An idea for a future iteration could be a tiny webcam inside one of the books to capture scares from the books POV and then wirelessly send them to your computer for subsequent upload to your favorite social networking site.