Secret Passageway Switch

Cause you know you always thought it was cool when you saw the Scooby gang fall through bookshelves from pulling a book-lever...

"Nearly as important as selecting the right room in which to put your secret passageway is selecting the method by which you'll access it. This Secret Passageway Switch ($50) is a fine choice, using one of your own books as the activator. Of course, you can also use it for more mundane purposes — like turning on a lamp — but where's the fun in that?" - Uncrate

via Uncrate