Cathy Hapka Books

Friends 4 ever

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"When a student named Ashley enrolls at East High, Gabriella, who has plenty of experience transferring to new schools, offers to show her around. But Gabriella soon begins to wonder if Ashley is u...

Sparkle Princess

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To The Rescue

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Peek A Boo Christmas Picture Me Books

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Sofia the First Sofia Makes a Friend World of Reading Level Pre 1

By Catherine Hapka

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Clue by Clue

By Kyla Garcia, Catherine Hapka

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LOST 1

By Cathy Hapka

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195 p. ; 18 cm

LOST 2

By Cathy Hapka

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LOST 3 Signs of Life

By Thompson Frank

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Carmen Sandiego

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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.