For reading addicts, book hoarding is a way of life. We just can't help it. And part of the fun of having piles and piles of books in our homes is organising and reorganising them by themes, colours, and other creative combinations. As we prepare for the inevitable addition of even more books this holiday season, we're looking to the gorgeous #shelfie inspiration readers around the world have been sharing on Instagram. See 20 of our favourites now!