when I was in college and studying, I had a real 'library', and did pretty well by subject matter...now only the SF and cookbooks and music books are 'together' (and Ferrara's art books and bird & flower books, which she uses for design)...

the rest are in boxes or shelves according to best fit!...Tedious!...old Philosophy texts next to guides to beer making and Erotic art...but it can be fun just digging thru and looking--I always find something I had forgotten about.