If you want to have paperback books last - cover them with clear contact paper, leaving a margin of 2 plus inches on the inside edge. For some reason, this seems to help the binding, as well as keeping the cover from getting frayed.
I have noticed that when a litter box becomes old and scratched up, the urine clumps (multi-cat clumping litter), especially the ones in the corners, tend to stick to the side of the box. I had broken a few scoops, and resorted to a trowel to dig them out. My cat is a diabetic. Some of those clumps were the size of Texas!
