Oh, you know the kind. Where you pull a particular book and the whole case opens to reveal a secret passageway and all kinds of mysterious and surreptitious doings and goods behind?
If you've got the space (and the secrets), you can have one, too.
Bob from I Like to Make Stuff offers his take on the secret door bookcase, constructing a custom case from MDF and pocket screws, then building a book-triggered hinge method that is, frankly, dope.
Bob offers the build process in the helpful video below, as well as an Instructable detailing the steps.
Check it out!
For an original ManMade take on something you could put together over a weekend, check out How to: Make a Secret Bookshelf Stash and Storage Spot