Mark Lehner Books

How the Great Pyramid was built Craig B. Smith foreword by Zahi Hawass.

By Smith Craig B.

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Das Geheimnis der Pyramiden in Agypten

By Mark Lehner

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Darstellung des aktuellen Forschungsstandes über Bau und Erforschung aller erhaltenen ägyptischen Pyramiden; reichhaltig illustriert.

Das Geheimnis der Pyramiden in Agypten.

By Mark Lehner

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The pyramid tomb of Hetep-heres and the satellite pyramid of Khufu

By Mark Lehner

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Red Sea Scrolls

By Pierre Tallet, Mark Lehner

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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.