Easy, Leenia. I've been known to "weed" out such books, for a variety of reasons. I work at a branch library, and the main library, and perhaps other branches, have copies. I'm always getting new books, and if the shelves are too tight, something has to go. Perhaps the copy is a bit worn, and I've gotten a replacement copy. What happens then? Well, some of these books end up in my personal collection (after I buy them from the library booksale), some I pass on to fellow folkies who are interested, and some I leave in the library booksale for diligent bookaholics like you, although now that I've discovered the 'Cat, I'll probably buy them and put them up for auction here.