I got an e-mail today reminding me of the upcoming switch to ISBN13 next January. Polaris has prepared a document that provides what looks to be a good overview, “Understanding the Impact of the 13-Digit ISBN(Understanding the Impact of the 13-Digit ISBN)”:, even if you are not their customer. You definitely want to be paying attention to this. Oh, and by the way, I have already seen two copies of two books, “Overcoming Sleep Disorders Naturally(Overcoming Sleep Disorders Naturally)”: and “An Army of Davids(An Army of Davids)”: that did not include an ISBN10.