Craig Hatkoff Books

Miss Alaineus

By Debra Frasier

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Can you believe?

By Sandra Markle

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The Magic School Bus Science Chapter Book 15: Voyage to the Volcano

By Judith Stamper, Judith Bauer Stamper

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Owen & Mzee: The True Story of a Remarkable Friendship

By Craig Hatkoff, Paula Kahumbu, Isabella Hatkoff

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Owen and Mzee

By Isabella And Craig Hatkoff

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This heartwarming story shows the power of a single friendship to transform a life, and inspires us all to look at the world around us and reach out to others.

Amazing True Story of Owen and MZee

By Craig Hatkoff

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Knut The Baby Polar Bear

By Juliana Hatkoff, Isabella Hatkoff

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Looking for Miza

By Juliana Hatkoff, Peter Greste

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In the heart of the Congo, a young orphaned gorilla named Miza is miraculously adopted by a Silverback Mountain Gorilla named Kabirizi and his family of twenty-seven. The amazing Congolese Mountain...

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.