Carolyn Otto Books

Dinosaur Chase

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A mother dinosaur reads her sleepy dinosaur son a bedtime story about a dinosaur chase that occurs when a precious necklace is stolen.

Dinosaur chase

By Carolyn Otto

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A mother dinosaur reads her sleepy dinosaur son a bedtime story about a dinosaur chase that occurs when a precious necklace is stolen.

I can tell by touching

By Carolyn Otto

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Explains how the sense of touch helps to identify everyday objects and familiar surroundings.

Ducks, Ducks, Ducks

By Carolyn Otto

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Four young ducks from the country have an exciting time when they visit their relatives in the city.

Ducks, ducks, ducks

By Carolyn Otto

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Four young ducks from the country have an exciting time when they visit their relatives in the city.

What Color Is Camouflage?

By Carolyn Otto

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Explains how animals, birds, reptiles, and insects vary their markings and color to hide from their enemies and respond to their environment.

Our Puppies Are Growing: Stage 1

By Carolyn Otto

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A dog's young owner describes the birth of her puppies and their first few weeks of life.

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.