Guelzo Allen C. Books

Robert E. Lee
Robert E. Lee

By Allen C. Guelzo

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A WALL STREET JOURNAL BEST BOOK OF THE YEAR • From the award-winning historian and best-selling author of Gettysburg comes the definitive biography of Robert E. Lee. An intimate look...

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The American Revolution
The American Revolution

By Guelzo Allen C.

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The American Revolution
The American Revolution

By Guelzo Allen C.

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Voices from Gettysburg
Voices from Gettysburg

By Allen C. Guelzo

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The voices of those who witnessed the Battle of Gettysburg and its aftermath with their own eyes – who saw the bloodshed, heard its din, trembled in its crash, struggled with its aftermath &n...

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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.

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