Michael Kerstgens Books

Neues Leben

By Michael Kerstgens

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The final winter

By Michael Kerstgens

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When the Berlin Wall fell in 1989, people celebrated in Germany and many other parts of the world. Less than a year later, the reunification of East and West Germany became a reality. At the same t...

Zwischenzeiten

By Karsten Krampitz, Michael Kerstgens

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Enemy Within

By Michael Kerstgens

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Michael Kerstgens

By Michael Kerstgens

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In 1986, the decade was halfway over. In April, the reactor in Chernobyl melted down, the Cold War was coming to an end, Helmut Kohl was chancellor, AIDS was just being perceived as a pandemic thre...

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.