Karin Halvorson Books

Super Simple Body Set 1

By Karin M D Halvorson

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Inside the brain

By Karin Halvorson

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Explains how the human brain works, including the brain stem, midbrain, and the medulla. Includes activities.

Inside the ears

By Karin Halvorson

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Explains how human ears work, including the pinna, ear canal, and ear drum. Includes activities.

Inside the eyes

By Karin Halvorson

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Explains how human eyes work, including information on the rods and cones, irises, and pupils. Includes activities.

Inside the heart

By Karin Halvorson

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This book describes the location, parts, and functions of the heart. Includes activities.

Inside the stomach

By Karin Halvorson

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This fun and easy introduction to how the stomach works includes simple activities and crafts like sugar or spice and follow your food and how to make a stomach.

Super Simple Body Set 2

By Karin Halvorson

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Inside the Brain

By Karin Halvorson

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Inside the Ears

By Karin Halvorson

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Inside the Eyes

By Karin Halvorson

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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.