Penny McDonald Books

We March for You

By Penny MC Donald

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We share our world

By Penny McDonald

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We Share our World is for: Kids and their families. This includes honoring parents and grandparents whose native language is Spanish. Some may not be entirely comfortable with their own English but...

Cooperation at the Computer

By Penny McDonald

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Much Ado About Something

By Penny McDonald, Michael Rubbo

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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.