Perfect! I would keep all of my zombie apocalypse survival stuff behind it -"Four Words: Secret. Folding. Bookself. Door. 'Nuff Said."
If you've managed to scrimp and save $3,000 for some much needed home improvement, forget about fixing that giant hole in the floor of the kids' room and instead install this secret folding bookshelf door in front of your study.
A very cool and creative bookshelf