Cathy Hapka Books

Splash s secret friend

By Cathy Hapka

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When Splash doesn't show up to dolphin school on time, Pearl, Echo, and Flip are worried.

Flip s surprise talent

By Cathy Hapka

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Coral Cove Dolphin School has it's annual Show Off Day.

Kindergarten rules

By Cathy Hapka

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"Ben is in kindergarten. He likes school. But there are a lot of rules. Maybe some rules can be fun!"--Page 4 of cover.

With just a few weeks until the wedding, Aunt Sophie's fiancé, Henry, has gone missing in the jungle. It's up to Olivia and her friends to save him. But the jungle is a dangerous place, and there's...

Bugs in the Garden Kindergarten Kids

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The New Pony

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Heart of a Dolphin

By Cathy Hapka

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When Annie spots a dolphin trapped in fishing line in the cove near her house, she rushes to free him. Everyone cheers when she returns to shore, but only Annie knows that she and the dolphin have...

Splash's secret friend

By Cathy Hapka

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When Splash doesn't show up to dolphin school on time, Pearl, Echo, and Flip are worried.

Curious George s Dinosaur Discovery

By Reading

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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.