Clayton K. S. Chun Books

Thunder over the Horizon: From V-2 Rockets to Ballistic Missiles

By Clayton K. S. Chun

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Do oil exports fuel defense spending

By Clayton K. S. Chun

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Many national security analysts have viewed oil-exporting countries with some trepidation. Although these exporting nations supply a vital energy source to the United States and her allies, it come...

Shooting down a star

By Clayton K. S. Chun

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Aerospace power in the twenty-first century

By Clayton K. S. Chun

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The fall of the Philippines, 1941-42

By Clayton K. S. Chun

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The Philippine Islands stood in the way of Japanese expansion in the Pacific, and were therefore an immediate target when war broke out in December 1941. Defended by a mixed Filipino-American force...

US Army in the Plains Indian Wars 1865 1891 Battle Orders

By Clayton Chun

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The Doolittle Raid 1942

By Clayton Chun

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Defending Space

By Clayton Chun

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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.