Allen Varney Books

The Willow Sourcebook: The People, Places, Monsters, and Magic of George Lucas's Hit Film

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Magic: The Gathering: The Pocket Players' Guidefor Magic: The Gathering

By John Tynes, Paul Person, Tom Wylie, Jim Lin, Steve Conard, Rich Redman, Charlie Catino, Eric Doohan, Dave Pettey, Richard Garfield, Mark Rosewater, Duelists Convocation, Joel Mick, Beth Moursund, Allen Varney

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Five Coins For A Kingdom: Standard Module M4

By Allen Varney, Paul Jaquays

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An Egyptian-themed adventure module for the Dungeons & Dragons fantasy role-playing game.

Marvel Super Heroes Gamebook 4

By Allen Varney

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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.