Ruth Downie Books

Ruso and the Demented Doctor: Roman Historical Mystery

By Ruth Downie

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Ruso and the Root of All Evils

By Ruth Downie

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Gaius Petreius Ruso, doctor to the Legions, is about to return home to Gaul after many years' absence. Little does he realize the letter summoning him back has been forged, or that the sunny Medite...

Medicus and the Disappearing Dancing Girls

By R. S. Downie

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Medicus and the disappearing dancing girls

By Ruth Downie

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Medicus and the disappearing dancing girls

By Ruth Downie

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Medicus

By Ruth Downie

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Cockpit navigation guide

By Don Downie

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Medicus

By Ruth Downie

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Medicus

By Ruth Downie

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Medicus

By Ruth Downie

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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.