Jeffrey L. Ethell Books

Wings of War is the first book ever to present the complete story of World War II U.S. aviation in full color. Author Jeffrey Ethell has gathered a unique collection of 181 rare color photographs f...

World War II fighting jets

By Jeffrey L. Ethell

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During the desperate closing stages of the Second World War, the Germans brought into action several new aircraft types - the jet-propelled Messerschmitt Me262 Sturmvogel and Arado Ar234 Blitz and...

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.