This is a set piece for designed for tabletop RPGs like Pathfinder or Dungeons and Dragons. It takes about just about two 1" squares and is about 2" high, making it ideal for use with standard miniatures.
This thing was designed in sketchup and exported as a .STL using a plugin, so the geometry is likely imperfect. I printed it on a Printrbot LC using a 0.2mm layer height. It can be a little large for PLA prints, so you might want to use a heated bed or other means to ensure that it completes successfully. It can also be difficult to paint the inside of the bookshelf - you're going to need a thin brush.