Hank Chapman Books

The Letters of William S McCaskey

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Atlas Comics Library No. 3

By Joe Maneely, Mike Sekowsky, Hank Chapman, Michael J. Vassallo

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How To Smelt Your Gold & Silver

By Jr Hank Chapman

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What's Inside? The only smelting information currently available. A complete plain English step-by-step guide for the amateur or professional. Illustrated in both color and B&W. Includes flux formu...

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.