Christopher Perkins Books

Book of Exalted Deeds is the second title in the line of Dungeons & Dragons products specifically aimed at a mature audience. As the Book of Vile Darkness was a resource book on the most evil eleme...

Deluxe Player Character Sheets

By David Noonan

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Sons Of Gruumsh (Dungeons & Dragons D20 3.5 Fantasy Roleplaying, Forgotten Realms 4th-Level Adventure

By Christopher Perkins

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The first full-length Forgotten Realms adventure in three years! This adventure showcases the classic high fantasy for which the Forgotten Realms setting is known. Sons of Gruumsh features an epic...

Deluxe Eberron Player Character Sheets Eberron Accessories

By Christopher Perkins

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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.