hummm interesting.... I'm somewhat new here and I thought the focus of the forums was eBooks..... not paper????? (I was really referring to eBooks)
Also... some of us (well, at least me) have large reference libraries and reference books with are not worth much if key points and locations are not highlighted, marked, and noted for quick reference.
btw... concerning paper books... I have a certain well marked-up and "scribbled on" book which I wouldn't trade for 1000 new books!