Gary Holian Books

Gazetteer

By Sean Reynolds, Gary Holian, Erik Mona, Frederick Weining, Wizards Of The Coast, Inc

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Welcome to the world of the D&D game! The Dungeons & Dragons world is a place where powerful creatures contest with ordinary men and women in a subtle war pitting good agasint evil, law against ch...

Living Greyhawk Gazetteer

By Eric L. Boyd, Gary Holian, Sean K. Reynolds, Erik Mona, Frederick Weining, Erik Mona, Frederick Weining, Gary Holian, Sean K. Reynolds

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Make the world your own! At gaming tables everywhere, the future of the Greyhawk setting turns on the rolls of dice and the actions of thousands of Dungeons & Dragons players. This comprehensive so...

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.