John Aberth Books

Criminal churchmen in the age of Edward III

By John Aberth

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Criminal churchmen in the age of Edward III

By John Aberth

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A Knight at the Movies

By John Aberth

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From the Brink of the Apocalypse: Confronting Famine, War, Plague, and Death in the Later Middle Ages

By John Aberth

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"Relying on rich literary and historical sources John Aberth brings this period to life. Taking his themes from the Four Horsemen of the Apocalypse, he describes how the Great Famine and Black Deat...

From the Brink of the Apocalypse

By John Aberth

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A knight at the movies

By John Aberth

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A Knight at the Movies: Medieval History on Film

By John Aberth

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The Black Death

By John Aberth

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This new edition continues to provide a fascinating account of the plague that ravaged the world in the fourteenth century. An updated introduction provides important background information and add...

The Black Death The Great Mortality of 1348 1350

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The Black Death

By John Aberth

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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.