Gwen Hansen Books

Final Test The Secret of the Unicorn Queen Book 3

By Gwen Hansen

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The Secret of the Unicorn Queen, Vol. 1

By Josepha Sherman, Gwen Hansen

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DISCOVER THE SECRET OF THE UNICORN QUEENWhen her eccentric friend Dr. Reit invents an amazing transport into other worlds, Sheila McCarthy accidentally falls through the portal into the kingdom of...

Sun Blind The Secret of the Unicorn Queen No 2

By Gwen Hansen

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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.