Bookcases made of boxes of different sizes in transparent 10 mm extra light tempered glass, glued at 45° and deliberately overlapped in a misaligned and irregular way. Available with back in transparent extra light, smoked, bronze glass or in “transparent colored glass”, “matt colored diffusor glass”, “glossy colored diffusor glass” finish. The boxes lay on an oak base black lacquered open pore and they are fixed to each other by means of minimal chromed metal joints. Each composition is available in a version either usable from one or both sides.