These decals by ETSY member VIPdecals turn your staircase into a bookcase. Each step has a different background book, with a different coloured background. You can even choose which books you want to be on your “bookshelf”. It works by having the background a separate sticker to the title of the book, so it can literally fit any size of staircase, although it does take a little DIY skills to put it together. Each step will cost you about $20, so it can add up quickly if you have a few flights of stairs to do.