Stephen Yeardley Books

Survivalist'S Guide To Spelunking 5E

By Douglas Niles, Thilo Graf, Stephen Yeardley

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The Definitive Guide To Underworld Survival!the Survivalist's Guide To Spelunking Contains An Array Of Modular Tools, Tables, And Rules To Enhance And Customize Your D&d Game.

Rise of the Drow

By Stephen Yeardley, Jonathan G. Nelson

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Rise of the Drow: Collector's Edition is a 5th Edition compatible mega-adventure and setting for levels 1-15 (16-20 with exploration). Tonight, a ceremony of light is taking place on the surface. M...

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.