Catharina Valckx Books

Le roi et la poule Susie sont heureux ensemble. Aujourd'hui le Roi a décidé de peindre de le portrait de Susie la poule. Une fois le tableau terminé ils vont se coucher. Mais un tel chef-d'oeuvre a...

La Chaussette verte de Lisette

By Catharina Valckx

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L incroyable Zanzibar

By Catharina Valckx

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Zanzibar, un corbeau fin cuisinier reçoit la visite d'Achille Potin, un lézard à lunettes, journaliste à l'affût d'un exploit. Zanzibar décide alors de partir dans le désert pour essayer de porter...

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.