John Grainger Books

"The imperial succession at Rome was notoriously uncertain, and where possible, hereditary succession was preferred. But when the infamous emperor Domitian was assassinated in AD 96, he had no sons...

Nerva and the Roman Succession Crisis of AD 96 99 Roman Imperial Biographies

By John D Grainger

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The Seleukid Empire of Antiochus III

By John D. Grainger

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Nerva and the Roman Succession Crisis of AD 96 99

By John D. Grainger, John Grainger

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Nerva and the Roman Succession Crisis of AD 96 99

By John D. Grainger, John Grainger

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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.