Gary Underwood Books

The World of Geography World of Geography

By Wilson, Underwood., Gary Underwood

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First Principles

By Marylyn Underwood, Gary Underwood

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After First Principles

By Marylyn Underwood, Gary Underwood

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Frogs

By Gary Underwood

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Frogs can live wherever there is water. Some even live in deserts or in snow! This book looks at these amazing creatures that start off life in water and end up living on land. From their super-spe...

Giants of the animal kingdom

By Gary Underwood

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Watchmaker

By Gary Undwerwood

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Red Suitcase

By Gary Underwood

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People Power and Place Geography Unit Resource File 1

By Gary Underwood, Bruce Tamagno

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People Power and Place People and Environment

By Gary Underwood

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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.