Geoffrey Parker Books

War is a compelling subject. It is common to almost all known societies and periods of history. The Cambridge Illustrated History of Warfare provides a detailed and highly visual account of war in...

The World Crisis, 1635-1665

By Geoffrey Parker

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Religion, Empire, and War in the Early Modern World

By Geoffrey Parker

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World Crisis: Climate and Catastrophe in the 17th Century

By Geoffrey Parker

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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.