John Rhett Thomas Books

Marvel Monograph

By John Rhett Thomas, Leinil Francis Yu

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Marvel Comics

By John Rhett Thomas

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Art of Iron Man 10th Anniversary Edition

By John Rhett Thomas

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Marvel Studios' The Infinity Saga - Iron Man: The Art of the Movie

By John Rhett Thomas

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The official art book for the movie Iron Man, the 1st title reissue of the 24-book Marvel Studios The Infinity Saga series published as a resized matching set.The 1st of the 24 Marvel Cinematic Uni...

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.