We have a feature that lets you insert an ISBN into your book. The ISBN will appear on the colophon page, which comes after the book cover, and before the table of contents.

To add an ISBN to your book, go here:

leanpub.com/YOUR_BOOK/edit_isbn

...making sure to replace YOUR_BOOK with your book's unique address.

You can add a separate ISBN for each format.

After you enter an ISBN, be sure to click the blue "Update Book" button at the bottom of the page.

When you next generate a version of your book, you will see the ISBN on the colophon page.

Just to be clear, we do not require ISBNs!

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