Tony Allan Books

The Symbol Detective
The Symbol Detective

By Tony Allan

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Vikings
Vikings

By Tony Allan

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A superbly illustrated introduction to the famously warlike seafaring peoples of Scandinavia - a civilisation with a vivid mythology of gods, dwarves and magic, as well as a heritage of brilliant c...

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Which University Which Degree
Which University Which Degree

By Tony Allan

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Which University Which Degree
Which University Which Degree

By Tony Allan

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The Middle East Water Question
The Middle East Water Question
The Middle East Water Question

By Tony Allan, J. A. Allan

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Is there enough water on this planet for a global population that will shortly double its present size? The answer is of great importance for people everywhere, but particularly to the peoples and...

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Vikings
Vikings

By Tony Allan

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Mindmaster. Das virtuelle Labyrinth.
Maskenball zur Geisterstunde.
Profecias Prophecies
Profecias Prophecies

By Tony Allan, Allan Tony

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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.

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