Michael Tregenza Books

The Quizzer Book About Railways

By George Beal, Michael Tregenza

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The sun

By Alice Fields

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Explains the relationship of the sun to earth and the entire solar sytem.

Stars and planets

By Alice Fields

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Describes the sun, the planets which orbit it, and other phenomena of the universe, including asteroids, comets, meteors, and other stars and galaxies.

Espionage

By Michael Tregenza

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Quizzer Book about Mountains

By George Beal, Brian P. Price, Michael Tregenza

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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.