Stephen J. Leonard Books

Colorado, a history of the Centennial State

By Carl Abbott

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Denver

By Stephen J. Leonard, Thomas J. Noel

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Denver

By Stephen J. Leonard, Thomas J. Noel

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Trials and triumphs

By Stephen J. Leonard

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From the time of the stock market crash of 1929 to the return of prosperity in 1940-1941, Colorado suffered and overcame an unparalleled economic collapse. As banks and businesses failed, Coloradan...

Colorado a history of the Centennial State

By Carl Abbott

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Colorado

By Stephen J. Leonard, David McComb, Carl Abbott

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Colorado givers

By Thomas J. Noel

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Colorado

By Stephen J. Leonard, Thomas J. Noel, Carl Abbott

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The Art Of Charles Partridge Adams

By Dorothy Dines, Stephen J. Leonard, Stanley L. Cuba

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Thirty Years After the War

By Stephen J. Leonard

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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.