It used simple concept utilizing unused space, Custom Wood Bookshelf 12 Pin by OldAndCold is one example of that in the show. This is a brilliant idea of a wooden bookcase. The shelf has a series of pin 12 bookmarks. PIN separately and can be moved around the back to meet your needs at any time.
Custom Wood Bookshelf 12 Pin by OldAndCold
You can now put your collection of books with kerning without fear of being on the plate scattered because of the small wood so that the page remain intact. The plates can move back and forth under the book to control the high hang the books, allowing for different line size book in a straight line. having size: 70 cm (27.5) length x 4 cm (1.5 “) high x 2 cm (0.8”). String made from Waxed cotton and come in beige, dark brown and red.
Source : OldAndCold