"In the East, it is not uncommon for people to use thin mattresses in lieu of a bed. The mattresses are folded/rolled and stored away during the day to save space.
Creative photographer Yusuke Suzuki has taken this concept and transformed it to a short but fun series of photographs. The Book Bed allows you to literally crawl into the pages of a book; the pages act as blankets that you can use to keep yourself warm and cozy at night, while the bed itself can be folded/closed to create more space during the day." via Geek in Heels