Yeah man I speak a few languages and that doesn't compute in any of them! My books used to be all on shelves. Somehow now they are piled up. When you run out of room side to side, you move to up and down. Much more room up and down....
I have a friend who is a book fiend. He had a custom bookcase built for his collection to the tune of, well, I don't want to say. I think he only got away with it because his wife messes around with horses IIRC so I doubt she could complain. I guess everything is relative.