Justin Gray Books

A plague that turns those infected into montsters is raging through Manhattan. At the center of it all are Alex Mercer, a scientist infected by his own experiments, and two NYPD homicide detectives...

Jonah Hex

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Power Girl

By Justin Gray

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The Phantom Generations

By Mike Bullock, Tom DeFalco, Justin Gray, Will Murray, Gordon Purcell, Mike Baron, Pat Quinn, Ben Raab, Alex Saviuk, Aaron Shaps

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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.