I have a main book collection and that is done by title and then all the other books around my house, those I do by colour. So I colour code my books! I really like blues and purples and reds together so they’re all on my bedroom shelf. Anyways, my friend was absolutely horrified. She thought it was the most ridiculous thing she had ever heard. She was already unhappy that I was alphabetizing by title. Yeah, I’m a nerd.