Otto Friedrich Books

Before the Deluge: A Portrait of Berlin in the 1920's

By Otto Friedrich

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Olympia: Paris in the Age of Manet

By Otto Friedrich

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Blood and Iron: From Bismarck to Hitler the Von Moltke Family's Impact on German History

By Otto Friedrich

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In the turbulent history of modern Germany the name of Moltke has stood for military power and also enduring moral strength. At every major crisis in more than a century of German history the von...

City of Nets

By Otto Friedrich

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Before the Deluge: Portrait of Berlin in the 1920s, A

By Otto Friedrich

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Blood and Iron

By Otto Friedrich

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The Kingdom of Auschwitz: 1940-1945

By Otto Friedrich

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CIty of Nets

By Otto Friedrich

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Desert Storm

By Time Magazine

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Going Crazy

By Otto Friedrich

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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.