David Wells Books

Hidden Connections, Double Meanings: A Mathematical Exploration

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This superb introduction to the work of the famous Russian poet Anna Akhmatova (1886-1966) begins with an account of her life in pre-revolutionary St. Petersburg and Stalinist Russia, and focuses p...

Qabalah Made Easy

By David Wells

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Discover how to use the spiritual teachings of the Tree of Life to learn more about yourself, improve your experience on Earth, and fulfill your life purpose.The Qabalah is a Western non-religious...

21 Days to Understand Qabalah

By David Wells

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Discover spiritual illumination and how to fulfil your life's purpose with Qabalah: a Western non-religious mystic tradition containing magical knowledge and practices to help you fulfil your life...

Book of Curious and Interesting Puzzles

By David Wells, David G. Wells

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Tears for Fire

By David Wells

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Reishi Adept : Sovereign of the Seven Isles

By David Wells

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Tourniquet of Dreams

By David Wells

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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.