Gerd Koenen Books

Freiheit, Unabhangigkeit und Brot: zur Geschichte und den Kampfzielen der Arbeiterbewegung in Polen.

By G. Koenen, H. Kuhn, Gerd Koenen, K. Koenen

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Das „rote Jahrzehnt“ begann in der Bundesrepublik mit den Schüssen in Westberlin am 2. Juni 1967 und endete mit den Schüssen in Stammheim und der Ermordung Schleyers im „deutschen Herbst“ 1977. Das...

Vesper Ensslins Baader

By Gerd Koenen

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Traumpfade der Weltrevolution

By Gerd Koenen

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Die schwarze Front

By Gerd Koenen

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Preceded (on pp. 11-13) by Lev Kopelev's appeal to Russian writers and journalists to protest against antisemitism in the Soviet Union, surveys the increasing Jew-hatred propagated - since "perestr...

Was war der Kommunismus

By Gerd Koenen

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Utopie der Sauberung. Was war der Kommunismus

By Gerd Koenen

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Traumpfade der Weltrevolution

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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.