Cathy Hapka Books

Bionicle Chronicles 3: Makuta's Revenge

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"The Toa have triumphed over the Bohrok hordes. They have confronted the mighty Makuta. It is a time for great joy and celebration. And yet..."

Boxed Set 1 4 Mask Bionicle Chronicles

By Fiona Simpson

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Dreamer

By Cathy Hapka

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Cale and her father nurse an injured horse back to health and dream of winning a big horse race.

The helmet

By Cathy Hapka

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When Kowalski invents a helmet that can turn anything the wearer imagines into reality, King Julien puts it on and everything goes haywire.

At the show

By Cathy Hapka

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Jill and Apples are competing in the horse show, but when she sees the competition, Jill gets nervous that she and Apples will not measure up.

Mystery in the Whispering Woods

By Cathy Hapka

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"Andrea, Mia, Stephanie, Olivia, and Emma are headed to the Whispering Woods for a summer campout! The girls build a campfire, toast marshmallows, and share spooky stories. But when they hear the l...

Runaway Ponies

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Dawn of the dead

By Cathy Hapka

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Dawn has a secret, one she can't bear to tell a soul: She comes from a family of zombies! And while she won't know if she's gotten the family curse until her thirteenth birthday, she's forced to mo...

Sofia the first

By Cathy Hapka

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Meet Sofia, a little girl who lives a rather ordinary life. But everything changes when her mother, Miranda, marries the king. Overnight, Sofia becomes a princess, moves into the castle, gains a st...

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.