Jonathan Gray Books

Watching with The Simpsons

By Jonathan Gray

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Show sold separately

By Jonathan Gray

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Dead men s secrets

By Jonathan Gray

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"Archaeologist Jonathan Gray stumbled upon something that shocked him! ... a whole cache of out of place items that should not exist. And they weren't just in one place. There was a global pattern...

Ducktales

By Jose Maria Millet Lopez, Jonathan Gray, Paul Halas, David Gerstein, Joe Torcivia

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A collection of "Ducktales" comics in which Launchpad faces a yeti while on a trip in the Himalayas; Uncle Scrooge and his nephews fight Magica DeSpell; and Gyro Gearloose sends Launchpad back thro...

Dead men's secrets

By Jonathan Gray

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"Archaeologist Jonathan Gray stumbled upon something that shocked him! ... a whole cache of out of place items that should not exist. And they weren't just in one place. There was a global pattern...

Dead men's secrets

By Jonathan Gray

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"Archaeologist Jonathan Gray stumbled upon something that shocked him! ... a whole cache of out of place items that should not exist. And they weren't just in one place. There was a global pattern...

Unexpected Life : Volume I

By Jonathan Gray

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Perfect MURDER

By Jonathan Gray

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Unexpected Life : Volume VII

By Jonathan Gray

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Unexpected Life : Volume IX

By Jonathan Gray

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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.