Gerd Dethlefs Books

Vivat Clemens August!

By Gerd Dethlefs

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Der Freiherr vom Stein & Cappenberg

By Gerd Dethlefs

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Die Familie des Freiherrn vom Stein

By Gerd Dethlefs

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Das Cappenberger Chorgestuhl 1509 1520

By Meister Gerlach

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In der Stiftskirche Cappenberg in Selm steht das schönste und besterhaltene Chorgestühl Westfalens. Die südliche Rückwand mit rätselhaften Geheimfächern stammt von etwa 1290 und ist das älteste Möb...

Die Sammlung Nachtmann

By Robert Gundchen, Norbert Borste, Gerd Dethlefs

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Westfalen in Niedersachsen: Kulturelle Verflechtungen: Munster - Osnabruck - Emsland - Oldenburger Munsterland

By Helmut Ottenjann, Petra Mecklenbrauck, Hans Galen, Gerd Dethlefs, Stephan Kube, Norbert Damberg

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1789 Wien Munster Paris am Vorabend der Revolution

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Die Wappenminiaturen

By Gerd Dethlefs

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Gedenkschrift fur Peter Steppuhn

By Peter Steppuhn, Gerd Dethlefs

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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.