Nancy Castaldo Books

Ada Lovelace

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The Story of Seeds: From Mendel's Garden to Your Plate, and How There's More of Less to Eat Around the World

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Something as small as a seed can have a worldwide impact. Did you know there are top-secret seed vaults hidden throughout the world? And once a seed disappears, that’s it—it’s gone forever? With th...

Beastly brains

By Nancy F. Castaldo

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In Beastly Brains, Castaldo delves into the minds of animals and explores animal empathy, communication, tool use, and social societies through interviews and historical anecdotes.

Back from the brink

By Nancy F. Castaldo

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Back from the Brink answers these questions and more as it delves into the threats to seven species, and the scientific and political efforts to coax them back from the brink of extinction. This ri...

Keeping our earth green

By Nancy F. Castaldo

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School of Dragons 2

By Nancy Castaldo

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National Geographic Kids Mission: Polar Bear Rescue

By Nancy Castaldo

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Inspiring young animal lovers to get up close to the big bears of the Arctic and the real-life challenges they face is what this fascinating book is all about. Discover amazing true adventure stori...

National Geographic Kids Mission Polar Bear Rescue

By Nancy Castaldo, Karen Seve

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Ada Lovelace

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Wolves and Moose of Isle Royale

By Nancy Castaldo, Morgan Heim

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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.