Christopher L. Harbo Books

Easy Ocean Origami

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Do you love the ocean? Now you can create your own paper sea with *Easy Ocean Origami*. With a few simple folds you'll make a blue whale, a sailbot, a windsurfer, and so much more. Grab some paper...

Easy Origami Toys

By Christopher L. Harbo

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Do you like to make clever paper toys? With a few simple folds you can make a basketball hoop, a royal crown, a mini piano and much more.

The secrets of martial arts

By Christopher L. Harbo

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The secrets of martial arts

By Christopher L. Harbo

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The kids guide to paper airplanes

By Christopher L. Harbo

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Easy Magician Origami

By Christopher L. Harbo

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Do you love magic? Then try your hand at Easy Magician Origami. With a few simple folds you'll make a magic wand, a wizards hat, a fortune teller, and so much more. Grab some paper and start folding!

Easy space origami

By Christopher L. Harbo

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Easy Animal Origami

By Christopher L. Harbo

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The Explosive world of volcanoes with Max Axiom Super scientist

By Christopher L. Harbo

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"In graphic novel format, follows the adventures of Max Axiom as he explains the science behind volcanoes"--Provided by publisher.

Jack and Jill flip side rhymes

By Christopher L. Harbo

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"Color illustrations and simple text give the original Jack and Jill nursery rhyme, along with a fractured version from the perspective of the Jill"--

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.