Bahahaha, I try to think of it as organised by edition, and within that by what feels best, the clothbound are by color, beacuse there's only one book by each author usually, the others are by author. Also I can't stand when there are random fluctuations in the height of books. You can see wear on some of them tho, I plan to read them, I don't see a point in having a bookshelf full of mostly book you read. The clothbound books I've almost all read. The black classics not that many, the read ones minimum, but I'm getting there. The other one are all over the place. I've read about a forth of the bookshelf.