A 71-in bookshelf that claims a 12-in strip of wall and stacks eight open cubes up it, so a paperback collection, a CD run, or a plant display grows vertically where nothing wider fits. Four of the decks lift out and reset across five height positions, letting two 17-in cubes merge into one bay tall enough for art books or a router. Every shelf carries up to 22 lbs, thickened panels resist sagging across the span, and screw fasteners keep the joints tight. Non-slip pads guard the floor, and two anti-toppling kits anchor a tower only 9 in deep.