Why yes I have stacked books high enough to use them as end tables. Not only that I have enough books placed by the side of my bed that should I tumble out they would cushion my fall quite well. The only disadvantage is the under the bed black hole the some books get sucked into.
I also have on occassion decorated with my dogs. They are just the right size to use as large sofa cushions and if need be foot rests.
I've tried decorating with the Dread Boston Salty, but being a terrier he's too jumpy to do much with.