Richard M. Gardner Books

Diagrams and instructions for building more than 50 projects, including basketball and archery targets, bowling greens, tetherballs, batting and running devices, boxing and tennis practice gear, gy...

Make your own alternative energy

By Richard M. Gardner

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Describes solar, water, and wind power, nuclear energy, and integrated systems and their role in the future. Includes instructions for projects and experiments.

Make Your Own Comics for Fun and Profit

By Richard M. Gardner

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Hints for the beginning cartoonist on ideas, style, stories, rendering, and publication.

101 Costumes for All Ages, All Occasions

By Richard M. Gardner

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A guide to making costumes representative of all ages or eras and for all occasions.

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.