Eamon Duffy Books

Saints and Sinners: A History of the Popes Third Edition

By Eamon Duffy

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Marking the Hours: English People and Their Prayers, 1240-1570

By Eamon Duffy

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Humanism Reform and the Reformation

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What catholics believe about Mary.

By Eamon Duffy

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Published to mark the 500th anniversary of the events of 1517, Reformation Divided explores the impact in England of the cataclysmic transformations of European Christianity in the sixteenth and se...

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.