I am a book collector too. So was my mother-in-law. When I clean out her house (she had lived there for 54 years) I had so many books to donate/sell/discard! Literally thousands of books. They were stacked three deep on shelves all over the house. I promised myself that I would not do the same thing, so once a year I have to go on a ruthless cull of my books. It is a good feeling though to have spent a day moving everything around!