Kelly De Vries Books

Battles that changed warfare 1457 B.C 1991 A.D.

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"Features 20 key battles in which the introduction of new weapons had a revolutionary impact on the battlefield"--Jacket.

Medieval warfare 1300 1450

By Kelly DeVries

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Battles of the Ancient World 1285 BC AD 451

By Kelly De Vries

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Battle of Crecy

By Kelly De Vries, Michael Livingston

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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.