Harlow Giles Unger Books

Quot MR. PRESIDENT quot

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Henry Clay America s Greatest Statesman

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From the Publisher... In a critical and little-known chapter of early American history, author Harlow Giles Unger tells how a fearless young Kentucky lawyer threw open the doors of Congress durin...

Henry Clay

By Harlow Giles Unger

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Dr. Benjamin Rush

By Harlow Giles Unger

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Dr. Benjamin Rush

By Harlow Giles Unger

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First Founding Father

By Harlow Giles Unger

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The last founding father

By Unger Harlow G.

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Lion of liberty

By Unger Harlow G.

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Lion of Liberty

By Harlow Giles Unger

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Mr. President

By Unger Harlow G.

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"Although the framers gave the president little authority, George Washington knew whatever he did would set precedents for generations of future leaders. To ensure their ability to defend the natio...

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.