Christopher L. Harbo Books

Secrets of Martial Arts

By Michael Kelleher, Al Milgrom, Christopher L. Harbo, Tod Smith

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Mundo Explosivo de los Volcanes Con Max Axiom Supercientifico

By Strictly Spanish Translation Services Staff, Tod G. Smith, Christopher L. Harbo

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Mundo Explosivo de Los Volcanes con Max Axiom Supercientifico

By LLC Strictly Spanish, Christopher L. Harbo

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Easy Animal Origami

By Christopher L. Harbo

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Provides instructions and photo-illustrated diagrams for making a variety of easy animal origami models

Easy Ocean Origami

By Christopher L. Harbo

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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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Easy holiday origami

By Christopher L. Harbo

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"Provides instructions and photo-illustrated diagrams for making a variety of easy holiday origami models"--Provided by publisher.

Easy Magician Origami

By Christopher L. Harbo

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Easy Space Origami

By Christopher L. Harbo

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Easy Animal Origami

By Christopher L. Harbo

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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.