Robert W. Johannsen Books

Democracy on Trial

By Robert W. Johannsen

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The Lincoln-Douglas Debates of 1858

By Abraham Lincoln

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Stephen A.Douglas

By Robert Walter Johannsen

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To the halls of the Montezumas

By Robert Walter Johannsen

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"Our country has entered on a new epoch of its history," wrote a Whig Party journal in 1849, just after America's triumph in the Mexican War. Indeed, for that romantic generation of Americans in th...

To the Halls of the Montezumas: The Mexican War in the American Imagination

By Robert W. Johannsen

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The Lincoln-Douglas Debates of 1858

By Abraham Lincoln

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Democracy on Trial

By Robert W. Johannsen

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DEMOCRACY ON TRIAL

By Robert W. Johannsen

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The Frontier, the Union, and Stephen A. Douglas

By Robert Walter Johannsen

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Stephen A. Douglas

By Robert Walter Johannsen

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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.