The following is a list of where you do and don’t need an ISBN to publish:

Q: Do I need an ISBN to publish on Amazon?

You do not require an ISBN to publish on Amazon KDP (http://kdp.amazon.com). It is optional.
For more information click here.

Q: Do I need an ISBN to publish on Smashwords?

1. No you do not need an ISBN to publish on Smashwords Standard Catalog.
2. You only require an ISBN on Smashwords when your book is in their Premium Catalog and you want them to distribute your ebook to Kobo, Apple, and Barnes & Noble.
3. If you do assign an ISBN to your Smashwords ebook, you only require one ISBN.
4. For more information about Smashwords ISBNs, click here.
5. You assign your ISBN to your book through your Smashwords Dashboard > ISBN Manager.

Q: Do I need an ISBN to publish on Apple iBooks?

A: A: No, an ISBN is recommended, but you do not require an ISBN to publish on Apple iBooks. For more info, click here.

Q: Do I need an ISBN to publish on Google Play (Books)?

A: Yes you require an ISBN to publish on Google Play (Books).

Q: Do I need an ISBN to publish on Kobo?

A: You will be able to publish through Kobo without an eISBN, but they strongly advise that you have one so you can take full advantage of Kobo’s partnership with leading retailers around the world.
eISBNs are a requirement of a number of their international retail partners and the inclusion of an eISBN enables your book to be available from all of their eBook retail partners, so the inclusion of an eISBN will allow them to distribute your eBook through all possible channels. For more info, click here.

Q: Do I need an ISBN to publish on B&N Nook Press?

A: No you do not require an ISBN to publish on Nook Press. For more info, click here.

Q: Do I need an ISBN to publish on Createspace?

A: Yes you require an ISBN to publish on Createspace? For more information click here.

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