Okay, so it's not completely invisible, but until somebody invents a cloaking device, it's probably as close as we're gonna get. Built by Tham & Videgard, the Mirrorcube is one of what will be six units
Here's a really easy-to-follow video explaining the process of making and installing one of those cool, invisible bookshelves. To make one, you'll need to assemble the following:
Stickelbook’s invisible bookshelf consists of an extruded aluminum bracket onto which is attached a polypropylene strip of teeth. The teeth grip the pages and covers of paperback books, giving the allusion that the books are self-supporting. Cool, huh? The Sticklebook, which is 50cm long and holds approximately 13 average-sized paperbacks, is available through the manufacturer’s website for a rather reasonable $28.70.