Roger Judenne Books

Le proprietaire de cathedrale

By Roger Judenne

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La Griffe de l enfer

By Roger Judenne

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Deux tributs ou clans d'un monde inconnu s'exterminent mutuellement. Dans une trame lourde et violente, l'auteur dénonce la guerre garante de paix et l'escalade de l'armement.

La momie du temple interdit

By Gerald Gorridge, Roger Judenne

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Une vie a tout prix

By Roger Judenne

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Roman - France - Colombie - santé - greffe (chirurgie).

La malediction de la coca

By Roger Judenne

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En Colombie, la guérilla contrôle le trafic de cocaïne. Pour lutter contre ce trafic, les militaires pulvérisent par avion un produit toxique. Celso et sa petite soeur Maria tentent de fuir cette p...

La malediction de la coca

By Roger Judenne

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Deux pirates pour un tresor et autres contes de pirates

By Roger Judenne

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Un recueil de neuf contes ou histoires sur le sujet énoncé.

L enfant chevreuil

By Morgan, Roger Judenne

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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.