Last Updated on December 8, 2025 by NEK Editing

If you are an author who self-published your book on Amazon KDP using the free ISBN, you may be wondering, “Can I change it to my own?”

You’re not alone; many authors start with the free KDP ISBN for convenience, only to realize later that owning their ISBN gives them more publishing control, flexibility with distributors, and a professional edge.

In this guide, we’ll walk you through everything you need to know about switching from a free KDP ISBN to your own — including what an ISBN is, why you might want to replace the free one, and exactly how to make the switch without disrupting your book’s availability.

What an ISBN Is and Why It Matters

ISBN stands for International Standard Book Number and identifies a book’s title, author name, and publisher or imprint. An ISBN can also identify the edition and format, such as an eBook, audiobook, paperback, or hardcover. When an ISBN has been assigned and used, it cannot be applied to another book or publishing format.

An ISBN is owned by the entity that purchases it and is listed as the publisher of record, which can be a traditional publisher, a self-publishing author, or a hybrid publishing services provider. The entity that provides the ISBN is listed as the book’s publisher in databases, influencing its distribution and metadata. 

This means a free KDP ISBN lists Amazon as the publisher and is restricted to the Amazon platform, signifying your book can only be available through KDP and its distributors.

On the other hand, an ISBN that is purchased by you allows you to list yourself as the publisher and use that single ISBN to distribute your book across multiple platforms like Ingram Spark, Apple Books, and Barnes & Noble. Therefore, if you want your own name (or imprint) to appear as the publisher, you must purchase and provide your own ISBN. 

Important Considerations Before Switching ISBNs

Before switching from Amazon’s free KDP ISBN to one you purchase yourself, it’s important to understand what the process involves. You cannot simply edit or swap the ISBN on an already-published book. Instead, you will need to create a completely new edition of your book and assign it the new ISBN. This means re-uploading your files in KDP as if you are publishing a new title.

Another factor to keep in mind is that reviews and sales rankings from your original edition do not transfer automatically to the new one. This can be discouraging for authors who have worked hard to collect reviews, as the new edition will start with a clean slate. If reviews and rankings are a major part of your marketing strategy, you’ll want to weigh this carefully before making the switch.

Finally, consider the financial side. Purchasing ISBNs in the United States is done through Bowker, and costs can add up — especially if you plan to release multiple formats like paperback, hardcover, and eBook. Buying ISBNs in bulk is more cost-effective, but it’s still an upfront investment you should budget for.

How to Switch from a Free KDP ISBN to Your Own

Follow these steps to switch your free KDP ISBN to your own:

1. Purchase your own ISBN(s) from Bowker or your local ISBN agency.
2. Register your book’s new edition format(s) with the new ISBN(s) (follow Bowker’s instructions).
3. Go to your KDP dashboard and unpublish the current version(s) of your book.
4. Create a new paperback or hardcover version in KDP with the new corresponding ISBN.
5. Enter your new ISBN and Imprint during setup.
6. Re-upload your manuscript and cover (updated for new ISBN if needed).
7. Publish the new edition and retire the old one (optional- see step 3).

Note: Bowker.com is the official ISBN Agency for the United States, providing identifiers, publishing services, and market data for the entire book industry. MyIdentifiers.com is a service operated by Bowker that allows U.S. authors and publishers to purchase ISBNs and manage their book metadata. In other words, MyIdentifiers.com isn’t a competitor but rather a specialized portal within the larger Bowker organization, focused specifically on ISBN purchasing and management, while Bowker.com offers a broader range of publishing services.

Tips for a Smooth Transition

Once you’ve published your new edition, there are a few steps you can take to make the transition as smooth as possible.

If you sell your book outside of Amazon, remember to update your metadata on other platforms with the new ISBN and make sure the old version is removed from circulation.

For example, on Goodreads, it’s important to make sure your new edition is properly linked so readers can easily find it and see all of your book’s reviews. Start by going to your book’s page and adding the new edition. Once it’s added, set it as the “primary edition” for the work. This will make it the default version that appears in search results and on your author profile, helping readers discover the most up-to-date edition.

You can also combine different editions of your book — such as the paperback and eBook — into a single “work.” This ensures that all ratings and reviews are shared across every format, giving your book the strongest possible presence on the platform.

If you find duplicate editions that need to be merged, a Goodreads Librarian can assist. Merging editions permanently deletes one of the duplicates and transfers all reviews to the remaining edition. This is different from combining, which simply links two valid editions together without deleting anything.

Beyond the technical steps, you’ll also want to let your audience know about the change. Announce the new edition to your readers, update your marketing materials with the new ISBN, and consider the timing carefully — avoid switching right before a major promotion or book launch to prevent confusion.

Finally, be mindful of some common pitfalls. Do not change key details like the title, subtitle, or author name, as this will prevent the editions from linking and your reviews from transferring. Avoid deleting the old book — Amazon will simply mark it as “out of print,” but keep the page active. And if your book is part of a series, make sure to remove the old edition from the series before unpublishing it so you can reuse the correct series number for your new edition.

Common Questions Authors Have About KDP ISBNs

Here are some common questions authors have about switching from the free KDP ISBN to their own.

Your Next Step: Make the Switch with Confidence

Switching from a free KDP ISBN to your own is more than just a technical change — it’s an investment in your author career. By owning your ISBN, you control the publisher’s name, gain more flexibility with distribution, and present a more professional image to readers, bookstores, and libraries.

While it takes a bit of work to republish your book with a new ISBN, the long-term benefits of independence and branding are worth it. If you plan to publish more books in the future, consider buying a block of ISBNs so you can stay consistent across your catalog.

Now that you know what’s involved, you can move forward with confidence and give your book the professional foundation it deserves.

If you have questions or need help with your KDP journey, contact NEK Editing.