Do You Need an ISBN to Sell a Book From Your Own Website?
No: if you sell a book only from your own website, nothing in the book trade is ordering it, so no ISBN is required....
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ASIN vs ISBN: What Amazon’s Book Number Is and What It Isn’t
An ASIN is Amazon's own catalogue number and an ISBN is the book trade's, so a print book on Amazon carries both. Here is...
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Do You Need a Separate ISBN for Your Audiobook?
An audiobook is its own edition, so it needs its own ISBN unless you publish exclusively through ACX, where Amazon's ASIN does the identifying.
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What Is the EAN-5 Add-On on a Book Barcode (and Do You Need It)?
The EAN-5 add-on is the small price barcode beside your book's main barcode; here is what it encodes and whether you actually need it.
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ISBN-10 vs ISBN-13: What’s the Difference and Do You Still Need Both?
ISBN-10 is the legacy 10-digit book identifier used before 2007; ISBN-13 is the current 13-digit standard. Self-published authors only need ISBN-13 for new books.
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What Are Free ISBNs and Should You Use One for Your Book?
Free ISBNs from KDP, IngramSpark, and Draft2Digital save money but limit portability and control over your publisher-of-record name in industry databases.
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Do You Need to Buy a Barcode Separately or Does Your ISBN Include One?
Most self-published authors never need to buy a barcode separately because print-on-demand platforms like KDP and IngramSpark generate one automatically from your ISBN.
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When Does a Revised Edition of Your Book Need a New ISBN?
A revised edition needs a new ISBN when the changes are substantial enough that a reader would expect a different product. Here is how...
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Do You Need Separate ISBNs for KDP and IngramSpark?
If you own your ISBN, you can use the same one on both KDP and IngramSpark for the same format — no separate ISBNs...
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