Tim’s Haunted Bookshelf
This is a project that I spent a lot of time working on and when you get it right can be a superb effect for your haunt. I never seemed to get mine working as smoothly as Timothy Ewing seems to have, but with his tutorial you should be able to do better than me. You’ll need a round steel shaft the length of your books, some aluminum stock, some screw eyes, rubberbands, a small motor (I used a wiper motor), and of course books!
I’m still hatching a plan to do this effect with mini-linear actuators, but until then, go with Tim’s Haunted Bookshelves blueprint.