Roger Wachtel Books

Old Ironsides

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The Tomb of the Unknown Soldier

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A description of the history and characteristics of the national monument known as the Tomb of the Unknown Soldier at Arlington National Cemetary, Arlington, Virginia, which was established after W...

The Medal of Honor

By Roger Wachtel

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"The Medal of Honor is a simple medal--just a five-pointed star hanging from a ribbon--but it has great meaning ... It can only be presented by the president of the United States, in the name of Co...

The Medal of Honor

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Donner Party

By Roger Wachtel

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Old Ironsides

By Roger Wachtel

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Tomb of the Unknown Soldier

By Roger Wachtel

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The Donner Party

By Roger Wachtel

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Recounts the journey of the Donner Party which, in 1846, sought to travel from Independence, Missouri, to California but took an untried shortcut that trapped them in the Sierra Nevada mountains du...

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.