Geoff Skellams Books

Advanced Player'S Guide

By Daren Bader, Aaron Rosenberg, Thomas Denmark, Jeffrey Quinn, Matt Milberger, Geoff Skellams, Jeremy McHugh, Bruce Graw, Patrick O'Duffy

Average: 0.00, 0 Ratings

Take Your Game to a New Level The Advanced Player's Guide is a companion volume to the Player's Handbook and other d20 core rulebooks which provides a wealth of new rules options for players and Ga...

Gamma World: Cryptic Alliances & Unknown Enemies

By Alejandro Melchor, Owen K. C. Stephens, Owen Stephens, Geoff Skellams

Average: 0.00, 0 Ratings

Gamma World Player'S Handbook: A Campaign Setting For D20 Roleplaying

By Ian Eller, Mikko Rautalahti, Bruce Baugh, Geoff Skellams, AASLOV SKULESON

Average: 0.00, 0 Ratings

The Final Wars destroyed civilization. Competing forces battle for control of the shattered remains, using everything from strong fists and cold steel to the most advanced science of the old world...

Masks Of Darkness (Dark Conspiracy, 2nd Ed. / Sin City Series, Vol. 3)

By Geoff Skellams

Average: 0.00, 0 Ratings

Houses Of The Bull God Exalted

By Michael Kessler, Andrew Watt, Geoffrey Skellams, Voronica Whitney Robinson

Average: 0.00, 0 Ratings

Night Horrors: Grim Fears

By John, Newman, Stephen DiPesa, Geoff Skellams, Matthew McFarland, Alex Scokel

Average: 0.00, 0 Ratings

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.