I love this piece because it reminds me of camping gear. Designed by Argentinean architect Ariel Jacubovich back in 2008, this piece is a great idea for book storage in small spaces. "The Pocket-Library" folds up into a 21" (55 cm) cube, and extends to full storage for books and CDs. Using straps to keep books organized it unfolds easily into vertical planes, so that you can easily scan for a book. Once folded up, the cube can be used as a small coffee or magazine table.
(images: via Treehugger)