Summary. ISBNs are not necessary to sell ebooks; none of the top online retailers require them. Printed books, however, cannot be sold without an ISBN. Remember that each version of your book would need a separate ISBN, and purchasing a block of 10 would be more cost-effective than purchasing one.

What if a book does not have an ISBN?

If your book does not have an ISBN, you will have to approach each outlet separately to ask them to list your title. ISBNs denote the official publisher of the book. ... Being officially listed as the publisher of your book, with your own ISBN prefix, means that you have an entry into more retail and library outlets.

Can we publish book without ISBN?

Ans. No, if there is no change of text, format or binding which would justify a new ISBN. However, a separate ISBN may be assigned if required by the supply chain.