John P. Sullivan Books

On holy ground

By John P. Sullivan

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Mexicos criminal insurgency

By John P. Sullivan

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This anthology represents some of the best and brightest scholars of today who are writing on the evolving security environment in Mexico and the implications this may hold for the United States. T...

Mexicos criminal insurgency

By John P. Sullivan

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The Brain Always Wins: Improving Your Life Through Better Brain Management

By John P. Sullivan, Chris Parker

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From an NFL sports psychologist comes a guide to achieving success and managing stress without sacrificing your health or happinessThe Brain Always Wins is the practical guide to improving your lif...

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.