In case you have more books than space for books, it’s time to think outside the standard shelf.

Köllen Bookshelf is a modular and interactive bookshelf which structure can be adapted to the user’s need. It has been made out of independent, adaptable pieces that can each be placed up or down, which can together form your own modular shelf. It’s made out of birch plywood, with light natural tones to match a multitude of rooms.  Each shelf module is about 3 feet long and can support a combined weight of about 66 pounds.

source:demilked