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 9.1kg (or 20cm ) of medium to large 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.Each Conceal Floating Bookshelf, Large, measures 5-1/2 by 7 by 15cm - 1.3cm .Also available is a smaller size for small books.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.Designed by Miron Lior for Umbra - original, modern, casual, functional and affordable design for the home.