Cathy Hapka Books

Clue by Clue

By Catherine Hapka

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Dolphin School 2 book set Pearl s Perfect Gift Echo s New Pet

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Monsters Inc

By Cathy Hapka

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Monsters Mike and Sully are terrorized by a human child and discover an evil plot at Monsters Incorporated.

Never Give Up Star Power Simon Schuster

By Cathy Hapka

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How Not to Babysit Your Brother Step Into Reading A Step 4 Book Paperback

By Ellen Titlebaum, Cathy Hapka

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Curious George s Dinosaur Discovery Curious George

By H. A. Rey, 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.