Helene Montardre Books

La quete aux coquelicots

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Un train qui s'arrête en pleine nature, un garçon qui s'en échappe et voilà le "retour aux sources" non prémédité d'un adolescent parisien. Dans ce roman pour jeunes, l'auteur a chanté avant tout l...

L enlevement de Persephone

By Helene Montardre

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Promethee le voleur de feu

By Helene Montardre, Nicolas Duffaut

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Orphee aux Enfers

By Helene Montardre, Nicolas Duffaut

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Alexandre le Grand

By Helene Montardre, Gilles Scheid

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Apprentis chercheurs

By Laurent Audoin, Helene Montardre

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L exploit de Gustave Eiffel

By Helene Montardre, Glen Chapron

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Les apprentis chercheurs

By Helene Montardre, Laurent Audouin

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Hercule et le lion de Nemee

By Helene Montardre

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Hercule et l hydre de Lerne

By Helene Montardre, Alban Marilleau

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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.