Stuart A. Kallen Books

John Jay

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Describes the life and political career of the man who was a delegate to the First Continental Congress, one of the authors of "The Federalist," and first Chief Justice of the Supreme Court.

Thomas Jefferson

By Stuart A. Kallen

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Presents the life of the third president of the United States, who wrote the Declaration of Independence and was known for his ability as an inventor and architect.

James Madison (Founding Fathers)

By Stuart A. Kallen

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A biography of the fourth president of the United States focusing on his role in establishing a new government for which he is remembered as the Father of the Constitution.

John Marshall

By Stuart A. Kallen

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A biography of the Chief Justice of the Supreme Court whose many decisions shaped American law and had lasting effects.

George Washington

By Stuart A. Kallen

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Presents a biography of the Commander in Chief of the Continental Army and first president of the United States.

Cats Set II Cats Set II

By Stuart A. Kallen

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Black History

By Stuart A. Kallen

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Kingdoms of Africa

By Stuart A. Kallen

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The Civil Rights Movement

By Stuart A. Kallen

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Striving into 2000

By Stuart A. Kallen

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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.