London-based Levitate Architects designed this crazy bookshelf built into a staircase for a couple in London. I was competely thrown off by the photos the first time I saw them. I couldn’t tell which way was up. The photo on the left is the view your feet would have as they are walking up the stairs. The photo on the right is a fish-eye lens view from the top of the stairs looking down. All this is pretty clever and all, but it would be a bit awkward to glance at your book collection to find a particular book. You’d have to crawl up your stairs guerrilla-style.