Jonathan E. Lewis Books

Spy Capitalism: ITEK and the CIA

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"What happens when the world of venture capital collides with the world of espionage? To find the answer, Jonathan E. Lewis takes us inside the executive suite at Itek Corporation during the Cold W...

Ancient Egyptian Supernatural Tales

By Jonathan E. Lewis Editor

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Reflections of a Cold Warrior

By Frances T. Pudlo, Jonathan E. Lewis, Richard Bissell

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Spy Capitalism ITEK and the CIA

By Jonathan Lewis

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Spy Capitalism

By Jonathan E. Lewis

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Spy Capitalism

By Jonathan E. Lewis

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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.