Simple but effective bookstand for collection on your shelves. Just teleport trough any book you like.
This thing is derivative of http://www.thingiverse.com/thing:5430 The original design was a great idea but was crappy to print. I recreated it in Google Sketchup. Editable sketchup file is attached if you feel like playing with it.
Print both halves of figure and two stands and glue them together. Painting portals to appropriate colors makes it more fun.
This design is 12cm high and is suitable for most books but if you have large books scale it up.