Barron John Books

KGB: the secret work of Soviet secret agents.

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"Portions of this material have appeared in Reader's Digest in slightly different form."

Operation Solo is America's greatest spy story. For 17 years, Morris Childs, code named "Agent 58," provided the United States with the Kremlin's innermost secrets. Repeatedly risking his life, "Ag...

KGB today

By Barron John

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The Fat Cat In The Red Hat Runs For Office

By Barron John

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KGB segodnia

By Barron John

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Economics: A Survey Custom Version for Purdue University eBook

By BARRON JOHN, BLANCHARD KELLY, LYNCH GERALD

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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.