Glen Cadigan Books

The Legion Companion

By Curt Swan, Mike Grell, Glen Cadigan, Dave Cockrum

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The Titans Companion

By Nick Cardy, George Perez, Glen Cadigan

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Titans companion 2

By Phil Jimenez, George Perez, Glen Cadigan, John Byrne

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"Following in the footsteps of the critically acclaimed Titans companion, The Titans companion volume 2 picks up where its predecessor left off, covering every incarnation of the Teen Titans from t...

Life and Art of Dave Cockrum

By Glen Cadigan, Dave Cockrum

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Life and Art of Dave Cockrum

By Glen Cadigan, Dave Cockrum

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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.