Sean Lerwill Books

Triathlon Manual: How To Train And Compete Successfully

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“236 pages : 28 cm "Interest in triathlon has vastly increased in recent years and this is now one of the most popular ways of getting fit. Most people approach the sport with experience of one dis...

Body Transformation Handbook

By Sean Lerwill

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Royal Marines Fitness Manual: Physical Training Manual

By Various, Sean Lerwill

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Running Manual: A Step-By-Step Guide

By Sean Lerwill, Haynes, Haynes, Sean Lerwill

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Running is one of the most popular ways to stay fit. Although it may seem that we can all ‘run’, there is so much to learn, whether for beginners or seasoned runners.The Running Manual covers every...

Running Manual: The Complete Step-By-Step Guide

By Sean Lerwill, Haynes, Sean Lerwill

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Successful Eating

By Sean Lerwill, Imogen Braithwaite

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Triathlon Manual

By Haynes

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Body Transformation Manual

By Sean Lerwill

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Royal Marines fitness physical training manual

By Sean Lerwill

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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.