Martina Winkler Books

Grenzen des Wachstums

By Andreas Koch, Martina Winkler

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Grenzen des Wachstums

By Andreas Koch, Martina Winkler

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Weltmeere

By Martina Winkler, Alexander Kraus

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Panzer in Prag

By Martina Winkler

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The whole world is watching as the Prague Spring comes to an end on August 21, 1968, with a brutal demonstration of power. On this day and during the first week after the 'socialist fraternal state...

Karel Kramar 1860 1937

By Martina Winkler

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1812 in Russland

By Martina Winkler

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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.