Robert Gaudi Books

African Kaiser

By Paul Hodgson, Robert Gaudi

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War of Jenkins Ear The Forgotten Struggle for North and South America

By Robert Gaudi

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War of Jenkins Ear The Forgotten Struggle for North and South America

By Robert Gaudi

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War of Jenkins Ear The Forgotten War for North and South America and the World That Made It

By Robert Gaudi

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African Kaiser

By Robert Gaudi

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The incredible true account of World War I in Africa and General Paul von Lettow-Vorbeck, the last undefeated German commander. “Let me say straight out that if all military histories were as...

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.