Zachary Kent Books

World War I

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Examines World War I, including the causes of the war, the important leaders and battles, America's involvement in the war, the home front, and the Allied victory.

Civil War

By Zachary A. Kent

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World War I

By Zachary A. Kent

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Civil War

By Zachary A. Kent

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World War I from the Lusitania to Versailles

By Zachary A. Kent

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Grover Cleveland

By Zachary Kent

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Follows the life of the minister's son who rose from being an honest city lawyer to serve two terms as American president.

William McKinley

By Zachary Kent

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Presents the early life, military career, and political life of the president who was assassinated in 1901 during his second term in office.

Calvin Coolidge

By Zachary Kent

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Describes the early life, education, and political career of the president who earned the nickname "Silent Cal."

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.