Mike Mearls Books

Player s Handbook

By Wizards RPG Team

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Monster Manual

By Wizards RPG Team

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Dungeon Master s Guide

By Wizards RPG Team

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The esteemed loremaster Volothamp Geddarm is back! And never has his research been so dangerous-- he's compiled a dissertation on iconic monsters! Elminster doesn't believe Volo got some the detail...

Aerial Adventure Guide

By Michael Mearls

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Blood Bayou Scarred Lands D20

By Mike Mearls

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Sword and Sorcery Natures Fury Sword Sorcery

By Mike Mearls, James Bell

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The Siege of Durgam s Folly Sword Sorcery

By Mike Mearls

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Psionics Toolkit

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Hunter

By Mike Mearls, Matt McFarland, Justin Achilli

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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.