Designer Bjørn Jørund Blikstad created these "2.5 dimensional" wall-hung shelves that combine real depth with optical illusions to bend your brain and hold your stuff. Second and a Half Dimension Shelves Previously:HOWTO make a bookshelf out of books Invisible bookshelf - floating stacks of books for your walls ... Bathtub with built-in bookcase HOWTO Make an upside-down bookshelf Equation Bookshelf with nesting parens Infinite bookshelf can't hold infinite number of books - Boing ... Platzhalter book shelf splits into "V" and reveals secret ... The Graffititek Bookshelf by Charles Kalpakian Gadgets...