David Jefferis Books

Cars

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What car can tow a water-skier? What car ran on solar power nonstop for 24 hours? What car had wings and could fly? Find the answers to these questions and more in this exciting book on the world's...

Soccer Sports Skills

By Norman Barrett, David Jefferis

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Rugby Union Sports Skills

By David Jefferis, Gill Lloyd

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Judo Sports Skills

By Norman Barrett, David Jefferis

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Gymnastics Sports Skills

By Norman Barrett, David Jefferis

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Tennis Sports Skills

By Norman Barrett, David Jefferis

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Cricket Sports Skills

By David Jefferis, Gill Lloyd

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The World Cup

By Norman S. Barrett

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Hockey Sports Skills

By David Jefferis, Gill Lloyd

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Gymnastics Sports Skills

By Norman Barrett, David Jefferis

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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.