Christopher Allmand Books

This seventh volume of The New Cambridge Medieval History covers the last century (interpreted broadly) of the traditional Western Middle Ages. It takes account of much new research and modern, int...

Emigration And Political Development

By Michaël Jones, Rosamond McKitterick, David Abulafia, David Luscombe, Jonathan Riley- Smith, Jonathon W. Moses, Christopher Allmand, Timothy Reuter, Paul Fouracre

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Complete 7 volume set of the definitive work of reference on the medieval world.

War Government and Power in Late Medieval France

By Christopher Allmand

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The De Re Militari of Vegetius

By Christopher Allmand

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La guerre de Cent Ans

By Christopher Allmand

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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.