Plus, shelves have two (possibly three) dimensions, so you can have organization running vertically and horizontally. The third dimension is into the bookshelf

Plus, shelves have two (possibly three) dimensions, so you can have organization running vertically and horizontally. The third dimension is into the bookshelf, if you have a bunch of double-shelved paperbacks. I have Jurassic Park shelved next to Frankenstein, with Tolkein up and to the right. The Lord of the Rings is in front of The Silmarillion, The Hobbit, and Unfinished Tales.