Torah Cottrill Books

Eberron Campaign Guide

By Keith Baker, Michele Carter, James Wyatt, M. Alexander Jurkat, Scott Fitzgerald Gray, Chris Sims, Torah Cottrill, Cal Moore, Robert J. Schwalb, Ari Marmell

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The Eberron (R) world moves into 4th edition D&D (R)! This books contains all the information any DM would need about the world of Eberron . This exciting world is complete with soaring cities, vis...

Dungeon Magazine Annual, Vol. 1: A 4th Edition D&D Compilation

By Miranda Horner, Torah Cottrill, Chris Youngs

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A collection of Dungeons & Dragons® adventures from the pages of Dungeon ® magazine. This official D&D® supplement gathers a year’s worth of adventures published in Dungeon magazine int...

Dragon Magazine Annual, Volume 1: A 4th Edition D&D Compilation

By Torah Cottrill, Chris Youngs

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The best of a year’s worth of Dragon® magazine content in one handy tomeThis book collects the best Dragon magazine content from the past year into one easy-to-reference source. The articles contai...

The Awakened II

By Kevin Kulp, Ty Johnston, Ed Greenwood, Rick Redman, Torah Cottrill, Rosemary Jones, Ken Shannon, Rai Smith, Hal Greenberg, Kevin Glusing

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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.