Jean Marc Doyen Books

"Henri Pottier a fêté son quatre-vingt-cinquième anniversaire le 4 novembre 2018. Jean-Marc Doyen et Cécile Morrisson ont, à cette occasion, réuni les contributions de vingt et un de ses amis et co...

Les monnaies du sanctuaire celtique et de l agglomeration romaine de Ville sur Lumes Saint Laurent dep. des Ardennes France

By Jean Marc Doyen

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Licinius et Constantin

By Jean Marc Doyen

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Tresors romains d Occident et d Orient IIe Ve siecles

By Jean Marc Doyen

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Gallia Belgica Germania Inferior Moesia Superior

By Jean Marc Doyen

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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.