eBook ISBNs

Publish Green provides two ISBNs, free of charge, when you distribute with us.

Each version of your eBook (MOBI and EPUB) will have its own ISBN. Even though both file types have the same content, each one must have a unique ISBN. This allows retailers, consumers, and publishers to differentiate between the two formats of your eBook, for both purchasing and stock control purposes. If you have a print version of your book, your eBook ISBNs will be different from that, as well.

The ISBNs that we provide will associate your eBook with Publish Green. Publishers buy ISBNs in blocks, so certain numbers within the ISBN identify the publisher of the book. Even so, you are welcome to use your own ISBNs if you have already purchased them. Just keep in mind that they must be different from those that appear in any print versions of your book.

When Publish Green provides your ISBNs, your eBook will be listed with Bowker's Books-in-Print. We are not able to do this when you supply your own ISBNs, so you may want to use the ones we provide, even if you have unused ISBNs of your own. Additionally, Publish Green will automatically assign ISBNs to your eBook unless you specifically request to use your own.