Georg Markus Books

Crime at Mayerling deals with two of the most sensational crimes committed during the past century. Although separated in time by a hundred years, they are inextricably connected. In January 1889 t...

Hans Moser der nachlass

By Georg Markus

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Mein Elternhaus

By Georg Markus

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Sie werden lachen es ist ernst.

By Georg Markus

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Mein Elternhaus

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Der Fall Redl

By Georg Markus

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Hans Moser

By Georg Markus

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Sigmund Freud und das Geheimnis der Seele

By Georg Markus

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Hans Moser.

By Moser Hans, Georg Markus

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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.