Du-Hyeogn Cha Books

A New Alliance for the Next Century

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Could the 38th Parallel - the last remaining Cold War frontier - collapse as did the Berlin Wall? Many observers believe that significant change between North and South Korea is only a matter of ti...

Options for Strengthening ROK Nuclear Assurance

By Kang Choi, Du Hyeogn Cha, Myong Hyun Go, Gregory Jones, Uk Yang

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Countering the Risks of North Korean Nuclear Weapons

By Kang Choi, Myong Hyun Go, Bruce W. Bennett, Bruce E. Bechtol, JiYoung Park

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Characterizing the Risks of North Korean Chemical and Biological Weapons Electromagnetic Pulse and Cyber Threats

By Kang Choi, Du Hyeogn Cha, Gregory S. Jones, Bruce W. Bennett, JiYoung Park

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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.