This is just delightful. A bookshelf designed to be assembled like a game, with no screws, tools or indeed muscles involved. Created by Gonçalo Campos, the piece is a soaring example of elegant functionality. It is comprised of two parts that interlock via simple slots, providing for a sturdy construction. The ‘X’ part gives structural integrity to the shelf, whereas the ‘I’ part contributes to its dynamic look. I also love that the instructions are engraved on the piece itself – no paper to fiddle with or lose. Beautiful, no-nonsense approach.