In my experience the answer to both questions is yes. I have discovered that inputting one ISBN got me an entirely different book then the one I had, shrug, so I changed it to match the one I have. The X has meaning but not quite sure what it means, but is not a scanner error. Shelley L. Rhodes, M.A., VRT And Guinevere: Golden Lady Guide Dog guidinggolden@xxxxxxxxx Guide Dogs for the Blind Alumni Association www.guidedogs.com The people who burned witches at the stake never for one moment thought of their act as violence; rather they thought of it as an act of divinely mandated righteousness. The same can be said of most of the violence we humans have ever committed. -Gil Bailie, author and lecturer (b. 1944) ----- Original Message ----- From: Kenneth Cross To: bksvol-discuss@xxxxxxxxxxxxx Sent: Tuesday, April 21, 2009 10:29 AM Subject: [bksvol-discuss] Two questions about ISBNs. If an isbn seems to end with an x, rather than with a digit, is it a scanner problem or is there some meaning. Second, if entering an isbn number gives a different and unexpected result, such as an incorrect copyright date, do you change that piece of information in the entry?