Quote:
Originally Posted by DNSB
From what I've seen, almost all self-published books get a Book ID which looks like 1230008927877 which is not a valid ISBN and likely the reason the field is now labelled as Book ID.
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Likely only SP ebooks direct on Kobo, or somehow distributed with no ISBN.
Quote:
Originally Posted by DNSB
A while back I had an issue with one library book where I got the wrong book from Kobo since the self-published book had the same ISBN as the library book. A while later I noticed their self-published books now had ISBNs starting with 123 which was likely to keep that issue from reoccurring.
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Someone cheated, or made a strange mistake*. An ISBN has to be issued by an agency and is unique even for different sizes of same content. An ebook can't legally use a paper book's ISBN, even if the same content and publisher.
[*
There is a check digit]
Quote:
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A different ISBN is assigned to each separate edition and variation of a publication, but not to a simple reprinting of an existing item. For example, an e-book, a paperback and a hardcover edition of the same book must each have a different ISBN, but an unchanged reprint of the hardcover edition keeps the same ISBN.
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—
wikipedia ISBN