Catherine Johns Books

The Hoxne Treasure

By Roger Bland, Catherine Johns

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The Snettisham Roman jeweller's hoard

By Catherine Johns

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Dogs

By Catherine Johns

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"With beautiful images of dogs as faithful companions and loyal friends as well as hunting and herding, and striking images of dogs in myth as monsters or gods, this is a wonderfully illustrated su...

Sex or symbol

By Catherine Johns

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Roman Britain

By T. W. Potter

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Show up and Shine

By Catherine Johns

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The jewellery of Roman Britain

By Catherine Johns

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Sex or Symbol

By Catherine Johns

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Jewellery of Roman Britain

By Catherine Johns

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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.