Thread: Why can't Calibre preserve ISBN-10 numbers?
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Old 10-30-2013, 11:17 AM   #8
unboggling
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Quote:
Originally Posted by MelBr View Post
Older books don't have ISBN-13 numbers even though Calibre manages to find them somehow since they were added to some books by publishers.

Problem is that if you open an older book, there is no ISBN-13 in it… only ISBN-10.

And I have problem with Calibre replacing data arbitrarily and not supporting ISO standard which specifies both ISBN-10 and ISBN-13 as standards.
Regarding ISBN disappearing after metadata download, when that happened in the past I would Extract ISBN (optional plugin) from the book or copy/paste a good ISBN13 from a site such as ISFDB. For old classics or other public domain books without an ISBN I'd usually not worry about an ISBN.
Last edited by unboggling; 10-30-2013 at 11:20 AM.
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