John Riddle Books

Lintball Leo: The Battle Of Right And Wrong

By John Riddle

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A History of the Middle Ages 300 1500

By John Riddle

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A History of the Middle Ages 300 1500

By John Riddle

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Bhopal

By John Riddle

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Presents an account of the 1984 chemical accident at the Union Carbide plant in Bhopal, India, and explores how the investigation of such accidents can lead to safety reform.

Great Disasters Set Great Disasters Reforms Ramifications

By John Riddle, John Ziff, Tracee De Hahn

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Writing and selling information the mail order way

By John Riddle

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Writing and Selling Information the Mail Order Way

By John Riddle

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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.