Christopher Campbell Books

"Tanks were one of the great but unknown, and unreliable, innovations of World War I. Manned by a motley 'band of brigands', amongst them mechanics, plumbers, motorcyclists, circus performers and p...

Target London: Under attack from the V-weapons during WWII

By Christopher Campbell, Christy Campbell

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Disarmament Debates

By Christopher Campbell

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Nuclear facts

By Christopher Campbell

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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.