Landry Walker Books

The Joker shares five stories from his cell at Arkham Asylum, including tales about the Mad Hatter, The Riddler, Killer Croc, Clayface, and Harley Quinn.

Supergirl

By Landry Walker

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Meet Linda Lee! She s the newest kid on the block and the planet, too! Find out how an ordinary girl from Krypton became the most extraordinary girl on Earth. And if you think life is tough as a he...

DC Comics Justice League The Ultimate Guide

By Landry Walker

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Enter the world of the Justice League™ and discover the heroes, villains, and adventures.This comprehensive guide celebrates the exciting world of the iconic Justice League Super Heroes, a roster t...

X Ray Comics Vol. 2

By Landry Walker, Eric Jones

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Tron The Ghost in the Machine No. 1

By Landry Walker, Louie De Martinis, Eric Jones

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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.