Holly Cefrey Books

This book describes the life and career of Justin Timberlake, who has developed his vocal, producing, writing, and musical skills and who has recorded "Justified," "Cry Me a River," "Like I Love Yo...

Career building through machinima

By Holly Cefrey

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Career building through music video and software mashups

By Holly Cefrey

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The biggest NASCAR races

By Holly Cefrey

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Gun violence

By Holly Cefrey

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Domestic violence

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Drinking and driving

By Holly Cefrey

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Justin Timberlake

By Holly Cefrey

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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.