Matthew Brennan Books

The How and Why Wonder Book of
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Top Guns
Top Guns

By Joe Foss

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Hunter Killer Squadron
Hunter Killer Squadron

By Matthew Brennan

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Emily and the werewolf
Emily and the werewolf

By Herbie Brennan, Matthew Brennan

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Emily plans to get rid of the local werewolf with the help of her grandmother and an old book called "Hypnosis for Beginners."

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Brennan s War
Headhunters
Headhunters

By Matthew Brennan

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Hunter Killer Squadron
Hunter Killer Squadron

By Matthew Brennan

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Seeing in the Dark
Seeing in the Dark

By Matthew Brennan

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Wordsworth, Turner, and romantic landscape

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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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