Martin P. Johnson Books

"The first comprehensive history of the composition of one of the most famous and iconic speeches in American history, one that persuasively resolves previously unresolved issues relating the speec...

The American Promise Value Edition Combined Volume

By Patricia Cline Cohen, Susan M. Hartmann, Sarah Stage, James L. Roark, Martin P. Johnson

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American Promise 7e Value Combined Volume Reef

By Patricia Cline Cohen, Susan M. Hartmann, Sarah Stage, James L. Roark, Martin P. Johnson

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American Promise 7e Value Combined Volume Reef

By Patricia Cline Cohen, Susan M. Hartmann, Sarah Stage, James L. Roark, Martin P. Johnson

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Writing the Gettysburg Address

By Martin P. Johnson

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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.