Mark Evanier Books

As the bird-brained wanderer Groo and his loyal mutt Rufferto crisscross the countryside, they encounter various acquaintances from years past--the hapless seaman Captain Ahax; the sinister witches...

Friends and Foes

By Sergio Aragones, Mark Evanier

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Groo

By Sergio Aragones, Mark Evanier, Tom Luth, Michael Atiyeh

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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.