My cats are book-eaters, so all the books live in the study and the cats are prohibited!
Shown above, 1 wall, 2 shelves and the aminools shelf
1 wall, and that's Elrond there on the left
3rd wall, with hip hamster digs to the side
We're planning on scrapping all the individual units and making one wall of standard and bracket shelves, to free up some elbow room.