: Re: Indie Publishing with more than one POD publisher & ISBN I saw the question about books published by more than one publisher, but it doesn't entirely answer my particular inquiry, which is this:

@Kevin153

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If you use your own ISBN, and you deliver the same content to each POD service, you can use the same ISBN for all of them.

If use a paid or discounted ISBN that you obtained through a POD service, check their rules for the agreement you made when you obtained the ISBN. CreateSpace offers several different agreements, each with different restrictions for how you can use it.

If you deliver substantially different editions to each POD service, each edition should get its own ISBN. I've never seen a good definition of "substantially different."

As for ISBNs on ebooks, you may not need them at all. Many distributors and retailers don't require an ISBN on ebooks. Some do.

If you choose to put ISBNs on your ebooks, and you deliver the same ebook content to different distributors and retailers, you can use the same ISBN on all of them.

If you deliver different content, I'm not sure. It's that ambiguous "substantially different" thing again.

Some people like to produce ebooks specialized for each retailer, with retailer-specific links inside (e.g. on their Books by the Author page). The Apple version would have iBooks links. The Kindle version would have Amazon links. And so on.

I don't know whether using different links makes the ebooks different enough to warrant separate ISBNs. That's one reason I don't use retailer-specific links in my ebooks.

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