Michael Haag Books

In 1187, nearly a century after the victorious First Crusade, Saladin captured Jerusalem. The Templars, headquartered on the Temple Mount, were driven from the city along with the Frankish populati...

The tragedy of the Templars

By Michael Haag

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The rough guide to The lost symbol

By Michael Haag

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Explores every aspect of Dan Brown's world in the novel, The lost symbol, including its historical and contemporary significance. Explores the real nature of the book's revelations and supposed cla...

The Rough Guide History of Greece

By Michael Haag

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The Rough Guide History of Egypt

By Rough Guides, Michael Von Haag

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Cairo Luxor Aswan

By Michael Haag

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Cairo Luxor Aswan Cadogan Guides

By Michael Haag

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Syria Lebanon 2nd

By Michael Haag

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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.