Greg Walker Books

Hi and Lois

By Brian Walker, Greg Walker, Chance Browne

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The KA-BAR Fighting/Utility Knife is the most widely recognized and popular combat knife ever to be produced in the United States. Since its introduction on 23 November 1942, the KA-BAR has perform...

The private life of Henry VIII

By Greg Walker

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Festival Setting of the Communion Liturgy

By John Ferguson

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John Heywood

By Greg Walker

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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.