John Earl Haynes Books

Introducing stylistics

By Haynes John

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The Secret World of American Communism

By Harvey Klehr

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The Soviet World of American Communism

By Harvey Klehr

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Based on documents newly available from Russian archives, The Soviet World of American Communism conclusively demonstrates the continuous and intimate ties between the Communist Party of the United...

Venona: Decoding Soviet Espionage in America

By Harvey Klehr, John Earl Haynes

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Venona: Decoding Soviet Espionage in America

By Harvey Klehr, John Earl Haynes

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Early Cold War Spies

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Early Cold War Spies

By Harvey Klehr, John Earl Haynes

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Early Cold War Spies

By Harvey Klehr, John Earl Haynes

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Pseudonyms of Authors

By John Earl Haynes

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Communism and anti-communism in the United States

By John Earl Haynes

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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.