Catherine H. Howell Books

National Geographic Pocket Guide to Reptiles and Amphibians of North America

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This basic beginner's field guide to our favorite animals that slither and swim is the latest in the growing National Geographic Pocket Guide series. Spot-on descriptive information and key facts a...

National Geographic Pocket Guide to the Mammals of North America

By Catherine H. Howell

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This field guide combines spot-on descriptive information, definitive photography, animal track silhouettes, and key facts in a handy, easy-to-reference volume. Including selected photography and n...

NG People of the World

By K. David Harrison, Catherine H. Howell, Spencer Wells

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National Geographic Pocket Guide to the Night Sky of North America

By Catherine H. Howell

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We all gaze at the night sky in wonder—and this guidebook, the ninth in the National Geographic Pocket Guide series, provides a go-to reference for everything filling the dark canvas above us...

Ultimate Explorer Field Guide: Reptiles and Amphibians

By Catherine H. Howell

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This fun, photo-filled, and fact-packed guide to reptiles and amphibians will make kids stop and look for all kinds of scaly and slimy creatures right in their own backyards. From turtles to geckos...

Flora Mirabilis

By Catherine H. Howell

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Flora Mirabilis is a sumptuously designed showcase of superb illustrations paired with fascinating stories of botanical exploration and trade through the ages. A collaboration between National Geog...

National Geographic Pocket Guide to Wildflowers of North America

By Catherine H. Howell

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With this basic beginner's field guide to North American wildflowers, all who enjoy nature and the outdoors can identify common wildflowers, from backyard weeds to dainty forest blossoms. In a logi...

National Geographic People of the World

By Catherine H. Howell

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From the heart of National Geographic comes this expansive guide to the clans, tribes, ethnicities, and peoples of the world. Organized in keeping with our knowledge of the migration of human group...

Ultimate Explorer Field Guide: Reptiles and Amphibians

By Catherine H. Howell

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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.