Cathy Hapka Books

Pony crazy

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"No one loves horses more than Meg. She has pony books, pony toys, and even a pony rug! But Meg lives in the big city and has never been around real ponies before. Then her family moves to the coun...

Merry Christmas Curious George

By H.A. Rey, Cathy Hapka, Margaret Rey, Mary O Keefe Young

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Pony crazy

By Cathy Hapka

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LEGO Friends

By Cathy Hapka, Ameet Studio Staff

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Echo s lucky charm

By Cathy Hapka

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Echo is helping her friends, Pearl, Splash, and Flip study for their first test in Magic class at dolphin school, but when Echo loses her lucky shell necklace she is barely able to do any magic unt...

Giving thanks

By Cathy Hapka

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"It is Thanksgiving. Jack wants to paint a turkey. But it is hard. Can his friends help him?"--Page [4] of cover.

LEGO Friends

By Cathy Hapka

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LEGO Friends

By Scholastic Staff, Cathy Hapka

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Merry Christmas

By H. A. Rey, Cathy Hapka, Margret Rey, Mary O Keefe Young

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Journey to the Moon 1

By Gillian Reid, Cathy Hapka, Ellen Vandenberg

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Can Astronaut Girl save the day with a little help from science? Find out as she and her space crew make their debut in this chapter book series!Val, aka Astronaut Girl, is just your typical eight-...

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.