Hans Hartje Books

Lettres a un jeune poete

By Rainer Maria Rilke, Hans Hartje, Claude Mouchard

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Une méditation sous forme de lettres sur la solitude, la création et l'accomplissement intérieur.

Blanche Neige

By Hans Hartje, Claude Mouchard, Robert Walser

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Wineries Bodegas

By Jeanlou Perrier, Hans Hartje

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La vie la mort les mots

By Sylvain Floc H, Jacques Gadeau, Hans Hartje, Gerard Lahouati

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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.