Do You Really Need an ISBN Number? A Comprehensive Look for eBook Authors

The decision to acquire an International Standard Book Number (ISBN) can be a critical one for eBook authors. While not every eBook requires an ISBN, it plays a vital role in book publishing and distribution. In this guide, we’ll explore when it’s necessary, when it’s optional, and the benefits it brings to authors and publishers.

What Is an ISBN?

An ISBN Number is a unique 13-digit identifier assigned to books, including eBooks, to distinguish them in the global book market. Publishers, retailers, and libraries use it to manage inventory and sales. Each format or edition of a book (e.g., hardcover, paperback, eBook) requires its own ISBN Number.

When Do You Need an ISBN for Your eBook?

1. Selling Through Retailers That Require ISBNs

Platforms like Apple Books and Kobo require an ISBN for eBooks sold on their marketplaces.
Having an ISBN simplifies tracking and sales reporting if you plan to distribute your eBook through multiple channels.

2. Professional Image

An ISBN conveys professionalism and signals to readers and retailers that your book is part of the mainstream publishing ecosystem.
Many libraries and academic institutions will not consider a book without an ISBN.

3. Expanding Distribution Beyond Amazon

Amazon assigns its identifier (ASIN) to eBooks sold on Kindle Direct Publishing (KDP). However, an ISBN is unnecessary for eBooks exclusive to Amazon.
If you plan to distribute your eBook through other platforms, an ISBN ensures consistency in its identification.

When an ISBN Is Optional

1. Exclusive Distribution on Amazon

If your eBook is only available on Amazon, the platform’s ASIN suffices. Amazon does not require an ISBN for eBooks.

2. Personal Sales

If you sell your eBook directly through your website, social media, or email list, an ISBN might not be necessary.
Personal distribution channels typically do not rely on ISBNs for inventory management or sales tracking.

3. Free eBooks

Promotional eBooks offered for free downloads generally do not require ISBNs unless you want to track them in distribution channels like libraries.

Benefits of Having an ISBN for Your eBook

1. Global Recognition

An ISBN ensures your eBook is cataloged in databases used by retailers, libraries, and bookstores worldwide.
It enhances discoverability, especially for readers searching for specific books or authors.

2. Trackability

ISBNs allow you to track sales, editions, and formats across multiple platforms, providing valuable data for marketing and future publishing decisions.

3. Ownership and Control

Purchasing your own ISBN gives you complete ownership. Free ISBNs provided by platforms often list the platform as the publisher, which may limit your branding and control.

4. Facilitates Print Versions

If you plan to publish both eBook and print versions, ISBNs streamline the process by creating clear distinctions between formats.

Potential Downsides of Not Having an ISBN

Limited Distribution
- Without an ISBN, your eBook might not be eligible for certain distribution channels, including libraries and international retailers.
Lack of Professional Perception
- Readers and industry professionals may view books without ISBNs as less credible or established.
Missed Marketing Opportunities
- ISBNs make it easier for your book to be discovered via metadata in global databases.

How to Decide if You Need an ISBN

Ask yourself the following:

Where will I distribute my eBook?
An ISBN is often necessary if you plan to sell on multiple platforms.
What is my budget?
ISBNs can be costly, particularly for self-published authors in some countries. Free ISBNs provided by platforms may be an alternative.
Do I want full control over my book’s metadata?
If maintaining control over how your book is represented is a priority, purchasing your ISBN is advisable.

Conclusion

While not every eBook requires an ISBN, having one offers numerous benefits, including broader distribution, enhanced discoverability, and professional credibility. Investing in an ISBN is a valuable step for authors aiming to establish a brand, expand their reach, or maintain control over their work. However, it may be an unnecessary expense for those focused on specific platforms or personal distribution.

By weighing your publishing goals and distribution strategy, you can decide whether an ISBN is essential for your eBook.

Author Profile

Adam Regan

Deputy Editor

Features and account management. 3 years media experience. Previously covered features for online and print editions.

Email Adam@MarkMeets.com