Thomas Kostigen Books

Golden dawn

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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...

What Money Really Means

By Thomas Kostigen

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The big handout

By Thomas Kostigen

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Big Handout

By Thomas Kostigen

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Cool Food

By Thomas Kostigen, Robert Downey Jr.

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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.