John Maxymuk Books

"This book essentially answers three questions about every professional head coach since 1920: Who was he? What were his coaching approach and style, in terms of both leadership and gridiron tactic...

Strong Arm Tactics

By John Maxymuk

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Uniform Numbers of the NFL

By John Maxymuk

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Pioneer Coaches of the NFL

By John Maxymuk

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Finding Government Information on the Internet

By John Maxymuk

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The quarterback abstract

By John Maxymuk

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Game changers

By John Maxymuk

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Steelers facts and trivia

By John Maxymuk

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The 50 Greatest Plays in New York Giants Football History

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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.