Traliccio invisible bookshelf - See the video:
http://www.4p1b.com/traliccio.html
Traliccio is a library wall in wood and metal. The shelves have been dematerialized and transformed to the point that they remain a thin bent rod that, thanks to its inclination, can accommodate books of different sizes.
The shelves can be easily moved either vertically, by utilizing the teeth found on the back of the two supporting columns of wood, or horizontally so as to leave the user maximum freedom of composition. Tralaccio is enriched with some accessories that complement its use, such as a top sheet and bookends.