Phil Masters Books

GURPS All Star Jam 2004

By Phil Masters, Gene Seabolt William H. Stoddard David Pulver, Jonathan Woodward And Jon F. Zeigler Brian J. Underhill

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Gurps Dragons

By Phil Masters

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Dragons! The most fabulous of all fabulous beasts. Throughout history, around the world, tales of fire-breathing monsters have stirred awe and terror. Now . . . play a dragon. Take to the air with...

Feel the Power! Fantasy settings are defined by their magic . . . so different worlds need different magic systems. GURPS Thaumatology has GURPS Fourth Edition updates of the best Third Edition mag...

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.