Thomas M. Kostigen Books

Green Book

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Ellen DeGeneres, Robert Redford, Will Ferrell, Jennifer Aniston, Faith Hill, Tim McGraw, Martha Stewart, Tyra Banks, Dale Earnhardt, Jr., Tiki Barber, Owen Wilson, and Justin Timberlake tell you ho...

Hacking Planet Earth

By Thomas M. Kostigen

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An exploration of the cutting-edge technology that will enable us to confront the realities of climate change.For decades scientists and environmentalists have sounded the alarm about the effects o...

Hacking Planet Earth

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Golden dawn

By Thomas Kostigen

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When journalist Michael Shea discovers a plot to smuggle nuclear materials into Iran, he must flee the Iranian secret service with the assistance of Neda Ghazali, a member of an ancient sect that g...

Golden dawn

By Thomas Kostigen

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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.