Tom McGowen Books

Album of dinosaurs

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A brief introduction to the history and characteristics of dinosaurs in general, with specific details of twelve different kinds.

Album of Astronomy

By Tom McGowen

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An introduction of astronomy, including a survey of the solar system, stars, comets, and the universe.

Album of Spaceflight

By Tom McGowen

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Discusses the history of space flight from the first rockets and satellites to a projection of a future with power plants in space and people living on space stations.

Album of Snakes and Other Reptiles

By Tom McGowen

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Discusses the characteristics of reptiles including snakes, turtles, and lizards.

Album of Rocks and Minerals

By Tom McGowen

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Describes the formation and uses of the world's leading minerals.

Album of Snakes and other Reptiles

By Tom McGowen

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Album of Sharks

By Tom McGowen

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A general introduction to sharks with specific descriptions of twelve different kinds.

Album of prehistoric man

By Tom McGowen

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A brief introduction to the evolution and characteristics of prehistoric people from apelike prehumans to modern human beings.

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.