John Cassidy Books

Juggling for the Complete Klutz

By John Cassidy

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How Markets Fail: The Logic of Economic Calamities

By John Cassidy

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Dot.Con: The Greatest Story Ever Sold

By John Cassidy

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Presents a history of the Internet stock market boom and inevitable crash, focusing on the role played by entrepreneurs, venture capitalists, Wall Street analysts, journalists, and policy makers.

Dot.con: How America Lost Its Mind and Money in the Internet Era

By John Cassidy

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An attitude of mind

By Cassidy John.

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Dot.Con: The Real Story of Why the Internet Bubble Burst

By John Cassidy

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The klutz book of brilliantly ridiculous inventions

By John Cassidy

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This is a collection of never-before-seen contraptions that are equal parts brilliant, useful, and ridiculous. None of them exist as actual products, but in a better world, a funnier world, they wo...

Poetry introduction 3

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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.