John Barron Books

K. G. B.: The Hidden Hand

By John Barron, Barron John

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Breaking the Ring

By John Barron, Barron John

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The story behind the search for the mysterious traitor in the FBI who passed millions of military secrets to the Soviet Union over a fifteen year period.

Breaking the Ring: The Rise and Fall of the Walker Family Spy Network

By John Barron, Barron John

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KGB segodnia: Nevidmye shupal'tsa KGB today. The hidden hand

By John Barron

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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.