What Is an ISBN and Why Do I Need One?

An ISBN (International Standard Book Number) is a unique identifier used to identify a specific book, edition and format.

Modern ISBNs contain 13 digits and allow booksellers, libraries, distributors and other organisations within the book trade to identify and manage your book.

Does every book need an ISBN?

Not necessarily.

If you're using Bookvault simply to print copies of your book, or you're selling through channels where a registered ISBN isn't required, you may be able to use a Bookvault Dummy ISBN instead.

However, if you want your book distributed through the wider retail network, you'll need a properly registered ISBN.

For a full explanation of when one is required, see:

Do I Need an ISBN to Sell My Book With Bookvault?

Does each version of my book need a different ISBN?

Yes. Different formats or editions of a book generally require their own ISBN.

For example, the paperback and hardback editions of the same book should have separate ISBNs.

For more information:

Do I Need a New ISBN if I Want a Different Format?

Where can I get an ISBN?

If you're publishing your book independently, you'll need to obtain and register your ISBN through the appropriate ISBN agency.

For example:

• UK and Ireland: Nielsen
• United States: Bowker

If you're publishing through Bookvault Publishing, Bookvault can provide a registered ISBN as part of the publishing process.

For more information:

How Do I Publish a Book With Bookvault?

Can Bookvault give me a free ISBN?

Bookvault doesn't provide free ISBNs simply for adding a standard title to the platform.

If you don't require a registered ISBN, Bookvault can instead generate a Dummy ISBN for use within the Bookvault system.

There is also a dedicated article explaining this:

Does Bookvault Provide a Free ISBN?

What if I've entered the wrong ISBN?

If you've already added your title and need to change its ISBN, see:

Can I Edit My ISBN Once I Have Added a Title?