Yes! I just found out that my local library takes old books. (They warned, "No dictionaries," but I will duly try to sneak one in.) Now I can drop off my old books and take my old clothes to the thrift store (which doesn't take books), and voila! Four square feet of new closet space, which will instantly disappear.
If you have books you don't read and can't find anyone to take them, looks like the library's the way to go.