Tony Duffy Books

Winning women
Winning women

By Tony Duffy

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Track and field
Track and field

By Tony Duffy

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Points out the prerequisites for becoming a good athlete, and introduces various types of running races, throwing events, and jumps. Acquaints readers with superstars in the field and explains how...

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Swimming and diving
Swimming and diving

By Tony Duffy

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Describes the four swimming strokes and other competitive events in swimming and diving, with advice for beginners.

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Sports Photography
Sports Photography

By Tony Duffy, Steve Powell

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Winning Women
Winning Women

By Tony Duffy, Paul Wade

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Track and Field
Track and Field

By Duffy

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Mental Skills for Swim Coaches
Casper Solution
Casper Solution

By Tony Duffy

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Athletics in focus

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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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