Close yourself in the book cave. The Cave Bookshelf is designed by Sakura Adachi. This bookself provides a reading place or ''cave''. perfect cubby hole to hide in with a good book. Books can be stored on both sides.
Levitate Architects used a staircase to a loft-like bedroom to create an enormous amount of book storage space. Even though the staircase isn't very compact but could accomodate so many books that it would save some space anyway.