Kelly Devries Books

This study departs from the conventional view of the dominance of cavalry in medieval warfare: its objective is to establish the often decisive importance of infantry. In pursuit of evidence, Kelly...

The Medieval City Under Siege

By Winthrop Wetherbee, MICHAEL TOCH, Paul E. Chevedden, Kelly Devries, Michael Wolfe, Heather Arden, Eric Mcgeer, James F. Powers, Michael Edward Mallett, Ivy A. Corfis, Denys Pringle, Bert Hall, Michael Harney

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Warfare in Europe in the middle ages underwent a marked change of emphasis as urban life expanded. The concentration of wealth represented by a city was a valuable objective, and the static nature...

The Battle of the Golden Spurs Courtrai 11 July 1302 A Contribution to the History of Flanders War of Liberation 1297 1305 Warfare in History

By J.F. Verbruggen

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Battles of the Medieval World

By Kelly Devries Martin Martin J. Dougherty Iain Dickie Phyllis G. Jestice Christopher Jorgensen

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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.