Jonathan Phillips Books

The First Crusade

By Jonathan Phillips

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CRUSADES V. 3 2004 ED. BY BENJAMIN Z. KEDAR.

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CRUSADES V. 4 2005 ED. BY BENJAMIN Z. KEDAR.

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Holy warriors

By Jonathan Phillips

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Holy Warriors

By Jonathan Phillips

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From an internationally renowned expert, here is an accessible and utterly fascinating one-volume history of the Crusades, thrillingly told through the experiences of its many players—knights...

Life to Worship

By Jonathan Phillips

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The Fourth Crusade

By Jonathan Phillips

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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.