Juliana Hatkoff Books

Good-bye Tonsils!

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There's only one way to make Juliana's nonstop sore throats go away, and that's to remove her tonsils. Dr. Ward and Juliana's parents help Juliana understand what will happen when she's in the hos...

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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How One Little Polar Bear Captivated The World Knut

By Juliana Hatkoff, Craig Hatkoff, Dr. Gerald R. Uhlich, Isabella Hatkoff

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Knut: How One Little Polar Bear Captivated the World

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Knut The Baby Polar Bear

By Juliana Hatkoff, Isabella Hatkoff

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Looking for Miza

By Juliana Hatkoff, Craig Hatkoff, Peter Greste

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In a magical place called the Congo, in the beautiful forests and jungles of Virunga National Park, lives a young female mountain gorilla named Miza. She was just like any other baby gorilla, ridin...

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.