Craig Comstock Books

Gift of Darkness

By Craig K. Comstock

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Enlarging our comfort zones

By Craig Comstock

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"How do we learn to enlarge our comfort zones rather than lapsing into a life of habit? How do we negotiate the awkward stage of trying something new and learn to operate there with success? This b...

Better Ways to Live

By Craig K. Comstock

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.