John B. Duncan Books

The Origins of the Choson Dynasty

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"Scholars have long held that Korea's Choson dynasty (1392-1910) was established by a new socioeconomic class of scholar-officials of local-landlord origins who overthrew the capital-based aristocr...

The institutional basis of civil governance in the Choson Dynasty

By John B. Duncan, Man Jo Chong

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Choson wangjo ui kiwon

By John B. Duncan

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A new history of Parhae

By John B. Duncan

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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.