Richard M. Ketchum Books

Lexington, Concord & Bunker Hill

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Will Rogers: His Life and Times

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Illustrated biography. Book Description: Biography. He was also, as has often been said, the most beloved figure of his time. Americans became acquainted with him in a variety of ways-as a perform...

Will Rogers: The Man and His Times

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The American heritage book of great historic places,

By Richard M. Ketchum

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American Heritage Book of Great Historic Places

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The winter soldiers

By Richard M. Ketchum

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The winter soldiers

By Richard M. Ketchum

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The borrowed years, 1938-1941

By Richard M. Ketchum

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The Borrowed Years: 1938-1941 America On The Way To War

By Richard M. Ketchum

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Borrowed Years

By Richard M. Ketchum

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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.