Klaus Jurgen Nagel Books

Arbeiterschaft und nationale Frage in Katalonien zwischen 1898 und 1923

By Klaus Jurgen Nagel

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Politics of religion and nationalism

By Ferran Requejo Coll, Klaus Jurgen Nagel

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"There are numerous examples of how religion and nationalism intertwine. In some cases, a common religion is the fundamental marker of a nation's identity, whereas in others secular nationalism tri...

Federalism beyond federations

By Ferran Requejo Coll, Klaus Jurgen Nagel

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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.