John Berardi Books

The Cheat to Lose Diet

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Burn Fat Faster with your favorite foodsAuthor, fitness expert, and Body-for-Life champion Joel Marion often found himself doing exactly what we all do when a diet simply isn’t working: quitting. B...

From Scrawny to Brawny

By John Berardi, Michael Mejia

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The Metabolism Advantage

By John Berardi

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The Metabolism Advantage

By John Berardi

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Scrawny to Brawny

By John Berardi, Michael Mejia

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A state-of-the-art weight-lifting and nutritional blueprint for "skinny" guys who want to pack on muscleLet's face it, naturally skinny guys are at a distinct genetic disadvantage when it comes to...

Change Maker

By John Berardi

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Change Maker

By John Berardi

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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.