Cathy Hapka Books

Snowman

By Rutherford Montgomery, Catherine Hapka

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When she finds some papers in her mother's dresser, Maddie suspects that her mother is being transferred again and is torn between helping her best friend and spending all her remaining time with h...

A winning gift

By Cathy Hapka

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True riders

By Cathy Hapka

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Brooke has major boy problems - from her brothers to her crush to her horse - in this sixth book in a contemporary middle grade series in the tradition of Marguerite Henry's Misty of Chincoteague.

True riders

By Cathy Hapka

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Brooke has major boy problems - from her brothers to her crush to her horse - in this sixth book in a contemporary middle grade series in the tradition of Marguerite Henry's Misty of Chincoteague.

Disney Junior Storybook Collection Special Edition

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All stuffed up

By Cathy Hapka

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"Donny's dusty teddy bear has him all stuffed up!"--Page 4 of cover.

Sofia makes a friend

By Cathy Hapka

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Sofia makes a new friend at the palace.

Holiday in Enchancia

By Cathy Hapka

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A snowstorm prevents King Roland from returning home in time for the holidays. Sofia leads her family on a brave expedition to find him, and shows Amber that spending the holiday with loved ones is...

Blue Ribbon Summer

By Catherine Hapka

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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.