Gerd Ludwig Books

Sleeping cars

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Es gibt mehr als sieben Millionen registrierte Fahrzeuge in Los Angeles. Bilder von Verkehrsstaus sind allgegenwärtig. Aber wo ruhen sich diese Autos nach getaner Arbeit aus? Gerd Ludwig ist ein na...

Spermatology

By Gerd Ludwig, Julian Frick

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Sit Stay Train Your Dog the Easy Way

By Gerd Ludwig

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My Dream Cat

By Gerd Ludwig

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1000 dog names I LOVE DOGS.

By Gerd Ludwig

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300 Questions About Cats Compass Guides

By Gerd Ludwig

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Sit Stay Train Your Dog the Easy Way

By Gerd Ludwig

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My rat

By Gerd Ludwig

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Practical Handbook

By Gerd Ludwig, Monica Wegler

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Broken Empire

By Fen Montaigne

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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.