Christian Petry Books

Der lange Weg der Bildungsreform

By Christian Petry, Hans Henning Pistor, Gisela Freudenberg

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Mein erstes Frage und Antwortbuch Fussball

By Andreas Piel, Christian Petry, Angelika Stubner

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Fussball

By Christian Petry, Andreas Piel

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Schon die jüngsten Kicker haben viele Fragen, wenn es um ihren Lieblingssport geht. Hier werden wissbegierige Nachwuchsfußballer mit allen wichtigen Informationen versorgt.

Wege aus der Ausbildungskrise.

By Ingo Richter, Christian Petry, Sabine Sardei Biermann, Andreas Flitner

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Wege Aus der Ausbildungskrise

By Ingo Richter, Andreas Flitner, Christian Petry

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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.