David Doyle Books

Inside Espionage

By Hope Doyle, David Doyle

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Cost Control

By David P. Doyle

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Sherman Tank Vol. 1: America'S M4A1 Medium Tank In World War II

By David Doyle

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This Book Documents The Development And Production Of The M4a1 Through Its Many Variations, As Well As Its Combat Use Around The Globe. Produced By Lima Locomotive Works, Pressed Steel Car Company,...

Stuart Tank, Vol. 1: The M3, M3A1, And M3A3 Versions In World War II

By David Doyle

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M3A1 Scout Car: The US Army'S Early World War II Reconnaissance Vehicle

By David Doyle

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B-26 Marauder: Martin’S Medium Bomber In World War II

By David Doyle

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PT Boats: The US Navy’S Fast Attack Patrol Torpedo Boats In World War II

By David Doyle

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Consolidated B-24 Vol.2: The B-24G To B-24M Liberators In World War II

By David Doyle

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The B-24 Liberator Remains To This Day The World's Most Produced Heavy Bomber And Multi-engine Aircraft, And The Most-produced Military Aircraft In Us History, With Almost 19,000 Examples Leaving T...

F6F Hellcat

By David Doyle

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P-47 Thunderbolt: Republic'S Mighty "Jug" In World War II

By David Doyle

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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.