Martin Kroger Books

"Der deutsche Diplomat Carl von Schubert (1882-1947), seit 1906 im Auswärtigen Dienste des Kaiserreichs, gehörte nach dem Ersten Weltkrieg zu den versiertesten und einflussreichsten deutschen Ausse...

Die Aussenpolitik der Deutschen lander Im Kaiserreich

By Holger Berwinkel, Janne Preuss, Martin Kroger

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Die Aussenpolitik der Deutschen lander Im Kaiserreich

By Holger Berwinkel, Janne Preuss, Martin Kroger

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Die Geschichtsbilder des Historikers Karl Dietrich Erdmann

By Roland Thimme, Martin Kroger

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Vermiedene Kriege

By Militargeschichtliches Militargeschichtliches Forschungsamt, Rolf Harald Wippich, Jost Dulffer, Martin Kroger

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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.