Jon Guttman Books

Groupe de Combat 12 Les Cigognes

By Jon Guttman

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Balloon Busting Aces of World War 1 Aircraft of the Aces

By Jon Guttman

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Bristol F2 Fighter Aces of World War I Aircraft of the Aces

By Jon Guttman

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Pusher fighters, designed with the engine at the rear and the machine gun at the front, may have looked ungainly, yet they were able to hold their own remarkably well against their German counterpa...

SPAD XIII vs. Fokker D VII

By Jon Guttman

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Pusher aces of World War 1

By Jon Guttman

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SPAD VII vs Albatros D III 1917 18

By Jon Guttman

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Naval Aces of World War 1 part 2

By Jon Guttman

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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.