1. says

    Fantastic article David! :)) Thanks a lot – i was absolutly confused when i was reading about a “eISBN” in Kobo… Crasy :D
    Now i can sleep in peace.

  2. cindie says

    I am converting our paper book to an ebook. I noticed on a Hunger games ebook, that there was an e-isbn number included in the copyright information. Glad to find your information and know that is incorrect!

    The correct way is to get a new ISBN for each format I use (EPUB, MOBI). What is the best (and most economical) way to get these numbers? Should the paper format ISBN numbers be referenced when Applying?

    Our book currently has an ISBN number for Paperback, one for Hardcover, and also a Library of Congress number. I should also mention that the content will Not change from paper to electronic, but I will not include an index and some of the fonts and formatting etc will obviously change.

    Thank you,

  3. says

    Hi Cindie. The only official source of ISBNs in the US is Bowker at Also, Bowker has changed their position and you do *not* need a separate ISBN for the EPUB and Mobi…just one number will do unless those two files have different content (i.e. one has video embedded and the other doesn’t). If you already have an ISBN, you must have an account with Bowker. Just buy more numbers for that account.

    I have recorded a 10 part training video on ISBNs and it covers all this. It is currently free for a limited time. You can learn more at

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