Robert J. Dalessandro Books

Army Officer s Guide

By Robert J. Dr Dalessandro

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Over There

By Robert J. Dr Dalessandro, Rebecca S. Dr Dalessandro

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Willing Patriots

By Robert J. Dalessandro

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Willing Patriots tells the story of Black Americans who served in the U.S. Army in the First World War. The book provides the reader deeply researched treatment of the organization, combat history/...

American Lions

By Robert J. Dalessandro

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Organization and insignia of the American Expeditionary Force 1917 1923

By Robert J. Dalessandro

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This book is the most comprehensive and detailed treatment of the origins, designs, and symbolism for each organizational shoulder sleeve insignia of the American Army in World War I ever published...

The Great War

By Robert J. Dalessandro

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Army Officer s Guide

By Robert J. Dalessandro

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Army Officer s Guide

By David H. Huntoon, Robert J. Dalessandro

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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.