A remanier pour faire une "partition" sur roulettes The lack of space for books is so astonishing that I cannot in good conscience call it a bookshelf, but it is an innovative and attractive decoration. Perhaps a room divider or window screen of sorts.
Small Space Secrets: Swap Your Bookcases for Wall Mounted Shelving. Here's a creative shelving arrangement that uses a deeper shelf at bottom to create a sort of bench. The bench can serve as extra seating for parties, or as a display space.