Step 3: How to make the door "swing"

Picture of How to make the door
Okay, here's where it gets kinda tricky.  the keys to a hidden door are the hinges have to be hidden.  there are a couple ways to handle this, if you door will swing in, you can simply put the hinges on the back.  I however wanted my door to swing out so the carbonite block can be seen as you open the door.

What I did was put the whole center bookshelf on wheels.  I then mounted thread pipe floor flanges with threaded pipe inserted in them.  I drilled a hole in the board I mounted accross the doorway and this allows the bookcase to swing in a fixed arc.