I purchased this book from the local library's Discard table. They periodically sell off older books or duplicate copies in order to make room for new books. Since it does not have the library's stamp on it anywhere, it was most likely donated to them and was too old, beat up, or a duplicate of what they already had. It cost me 25 cents. I've read it, and will give it to a co-worker. Please pass it on to others. Enjoy.