Cathy Hapka Books

Margret H.A. Rey s Merry Christmas Curious George

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Separated from the man in the yellow hat while at a Christmas tree farm, Curious George ends up at a hospital where he delights the child patients with his own brand of tree trimming.

Star Power 2

By Gillian Reid, Cathy Hapka, Ellen Vandenberg

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Mission to Mars 4

By Gillian Reid, Cathy Hapka, Ellen Vandenberg

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Oasis Dinotopia Paperback Bullseye Books

By Cathy Hapka

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The Trail Ride Turtleback School Library Binding Edition Pony Scouts Hardcover

By Catherine Hapka

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Tale of the Toa Bionicle Chronicles

By Cathy Hapka

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How Not to Babysit Your Brother Step Into Reading

By Ellen Titlebaum, Cathy Hapka

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The Enchanted Feast

By Catherine Hapka

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Vacation In The Wild Turtleback School Library Binding Edition I Can Read Level 2 Rio 2

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.