Jonathan Hennessey Books

Historia En Comic De Los Videojuegos

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The Comic Book Story of Video Games

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A complete, illustrated history of video games--highlighting the machines, games, and people who have made gaming a worldwide, billion-dollar industry/artform--told in a graphic novel format. Autho...

Alexander Hamilton

By Justin Greenwood, Jonathan Hennessey

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A graphic novel biography of the American legend who inspired the hit Broadway musical Hamilton. Alexander Hamilton was one of the most influential figures in United States history—he fought in t...

The Gettysburg Address

By Jonathan Hennessey

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The Comic Book Story of Beer

By Jonathan Hennessey, Mike Smith Artwork By Aaron McConnell

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A New York Times Best SellerA full-color, lushly illustrated graphic novel that recounts the many-layered past and present of beer through dynamic pairings of pictures and meticulously re...

Epochalypse

By Shane Davis, Jonathan Hennessey

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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.