For an ultra-minimal look, the Conceal bookshelf from Umbra mounts to the wall and becomes invisible behind a stack of books, giving the books the appearance of floating in mid-air. Attach the sturdy, L-shaped shelf to the wall with the included mounting hardware and slide one book onto the ledge so that the ledge is sandwiched between the book's cover and pages. Secure the cover in place using the integrated clips beneath the ledge. Stack up to 15-pound (or 8-inch) of small to medium books on top of the first book until the shelf is obscured from view. Conceal is constructed of strong, powder-coated steel and is available in two finishes. This model measures 5 by 5 by 5-1/2-inch. Also available is a larger size for large books and a wider model that holds two stacks side by side. The patented design by Miron Lior is the winner of many design awards including the Umbra Pratt Design Competition. A portion of the proceeds from the sale of this item is donated to the Pratt Institute School of Art and Design. Brought to you by Umbra - the worldwide leader in casual, contemporary, affordable design for the home.