Harry L. Katz Books

Mark Twain's America A Celebration in Words and Images

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"Mark Twain is an American icon. We now know him as the author of classics, but in his day he was a controversial satirist and public figure who traveled the world and healed post-Civil War America...

Civil War sketch book

By Harry L. Katz

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Cartoon America

By Harry Katz

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Caricatures and cartoons often depict the principal events and figures of the day; they are an indelible and indigenous part of American culture. This book speaks of the US nation's creativity and...

Life of the People

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The Boston Athenaeum Collection

By Boston Athenaeum., Jonathan P. Harding, Harry L. Katz

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A Continental Eye

By Harry L. Katz, Richard Chafee Essay

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Baseball Americana: Treasures from the Library of Congress

By Phil Michel, Harry Katz, Frank Ceresi

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Baseball Americana

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Mark Twain s America

By Library Of Congress, Lewis H. Lapham, Harry L. Katz

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Baseball Americana: Treasures from the Library of Congress

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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.