John Earl Haynes Books

"This stunning book, based on KGB archives that have never come to light before, provides the most complete account of Soviet espionage in America ever written. In 1993, former KGB officer Alexande...

Early Cold War Spies

By Harvey Klehr, John Earl Haynes

Average: 0.00, 0 Ratings

Venona

By Harvey Klehr, John Earl Haynes

Average: 0.00, 0 Ratings

Secret World of American Communism

By Fridrikh Igorevich Firsov, Harvey Klehr, John Earl Haynes

Average: 0.00, 0 Ratings

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.