John Kaufeld Books

The Official America Online Yellow Pages

By John Kaufeld

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Official America Online Golden Directory

By Jennifer Kaufeld, John Kaufeld

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Access 2007 for dummies

By John Kaufeld, Ken Cook, Laurie Ulrich Fuller

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Trading card games for dummies

By John Kaufeld, Jeremy Smith

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Internet games for dummies

By John Kaufeld

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Check out Magic: The Gathering, Heroclix, and more Explore popular games like Legend of the Five Rings, build decks, and trade online Whether you're already hooked on trading card games, want to...

Access 2000 for Windows for dummies

By John Kaufeld

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Games Online for Dummies

By John Kaufeld, John Kaulfeld

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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.