John Y. Simon Books

Lincoln Revisited Lincoln Forum Books

By Harold Holzer, Dawn Vogel

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The Lincoln forum

By Harold Holzer, John Simon

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"Each November, hundreds of Lincoln and Civil War enthusiasts mark the anniversary of the Gettysburg Address by gathering at Gettysburg for the annual Lincoln Forum, an acclaimed scholarly symposiu...

The Lincoln Forum

By Harold Holzer, John Simon

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Grant and Halleck

By John Y. Simon

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Meade s Army

By Theodore Lyman, David W. Lowe

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Continuing Civil War

By J. Simon

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Ulysses S. Grant one hundred years later

By John Y. Simon

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New Perspectives on the Civil War

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History 31st Regiment Illinois Volunteers

By John Y. Simon, John A. Jr. Logan

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The Lincoln Forum

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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.