Tom McGowen Books

Yearbooks in Science 1900 1919

By Tom McGowen

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Yearbooks in Science 1960 1969

By Tom McGowen

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African-Americans in the Old West

By Tom McGowen

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Describes the important role of freed slaves and other African-Americans in the settlement of the West.

The surrender at Appomattox

By Tom McGowen

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Details the events that led to General Lee's surrender to General Grant at Appomattox Court House, bringing an end to the Civil War.

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.