Christopher Tozzi Books

For fun and profit

By Christopher J. Tozzi

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For Fun and Profit

By Jonathan L. Zittrain, Christopher J. Tozzi

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The free and open source software movement, from its origins in hacker culture, through the development of GNU and Linux, to its commercial use today.In the 1980s, there was a revolution with far-r...

The State of Economics, the State of the World

By Kaushik Basu, Claudia Sepulveda, David Rosenblatt

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Leading economists address the ongoing challenges to economics in theory and practice in a time of political and economic crises.More than a decade of financial crises, sovereign debt problems, pol...

Power of Developer Advocacy

By Christopher Riley, Christopher Tozzi

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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.