Cathy Hapka Books

Charlotte's Web: New in the Barn

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This is a new story featuring the characters from 'Charlotte's Web'. Wilbur is sad to leave Fern, but then he meets all the inhabitants on Zukerman Farm.

While spending the winter holidays in Paris participating in a promotional video for the S.A.S.S. program, Nicole Larson is unnerved to discover that her feelings for Luc, the boy she met during he...

Mermaids in the backyard

By Cathy Hapka

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When her family moves from Chicago to an island in South Carolina, Lindy is sure she will be unhappy until she makes a surprising discovery in the backyard of their beach house.

Horse Diaries 6: Yatimah

By Cathy Hapka

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For all lovers of horses and history, it's the next book in the popular Horse Diaries series. Born in the Arabian Desert in the ninth century, Yatimah is a black Arabian filly whose name means "orp...

Horse Diaries 1: Elska

By Cathy Hapka

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Iceland, circa AD 1000Elska is a silver dapple Icelandic filly. She spends summers frisking about the countryside and winters in the farmyard, where the girl human Amma takes special care of her. B...

Mermaids in the backyard

By Cathy Hapka

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When her family moves from Chicago to an island in South Carolina, Lindy is sure she will be unhappy until she makes a surprising discovery in the backyard of their beach house.

Elska

By Cathy Hapka

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Around the year 1000, the Icelandic horse named Elska is born and learns about life and her role in the herd, as well as love and friendship, when she rescues the girl to whom she originally belong...

Yatimah

By Cathy Hapka

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In a mid-ninth-century Bedouin camp in the Arabian Desert, a horse is born to a prized Arabian war mare who dies during the birth, and the foal is raised with dreams of continuing her mother's glor...

Clue school

By Cathy 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.