Daniel E. Harmon Books

Southeast Africa

By Daniel E. Harmon

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West Africa, 1880 to the present

By Daniel E. Harmon

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A history of West Africa, from the explorations of eighteenth-century Europeans to the present day.

Lasalle and the Exploration of the Mississippi Explorers of New Worlds

By Daniel E. Harmon

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Jacques Cartier and the exploration of Canada

By Daniel E. Harmon

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Describes the life and travels of Jacques Cartier, the sixteenth-century French navigator who made three voyages to what is today known as Canada, in search of a northwest passage to China.

The U.S. Armed Forces Your Government How It Works

By Daniel E. Harmon

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The Attorney General s Office Your Government How It Works

By Daniel E. Harmon

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La Salle and the exploration of the Mississippi

By Daniel E. Harmon

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Jacques Cartier and the exploration of Canada

By Daniel E. Harmon

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Describes the life and travels of Jacques Cartier, the sixteenth-century French navigator who made three voyages to what is today known as Canada, in search of a northwest passage to China.

John Burgoyne

By Daniel E. Harmon, Arthur M. Schlesinger Jr.

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Lord Cornwallis

By Daniel E. Harmon

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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.