Helene Montardre Books

Achille le guerrier

By Helene Montardre

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Le labyrinthe de Dedale

By Helene Montardre

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Persee contre Meduse

By Helene Montardre, Nicolas Duffaut

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L enlevement de Persephone

By Helene Montardre

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Le fantome a la main rouge

By Helene Montardre

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Morgane, Ludo et Gégé sont partis pour la nuit au château des Cornes. Le ciel est beau, mais ils ne sont pas les seuls à admirer les étoiles. Une main rouge sur le mur signale une présence.

Dans le ventre du cheval de Troie

By Helene Montardre

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Les Collines de cristal et autres contes de Nouvelle Angleterre

By Helene Montardre

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La nuit du rendez-vous

By Helene Montardre

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Au bout du cerf volant

By Helene Montardre, Bruno Pilorget

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La Nuit du sortilege

By Helene Montardre

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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.