David Hilliam Books

Relates how King Richard I of England and his troops nearly wrested Jerusalem from Muslim leader Saladin and the Saracens during the Third Crusade in 1191 A.D.

Eleanor of Aquitaine

By David Hilliam

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Joan of Arc

By David Hilliam

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A discussion of the life and times of the French heroine, Joan of Arc, with illustrations from the medieval period.

Thomas Becket

By David Hilliam

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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.