Michael Valentine Books

"Even though you are a hard working knowledge worker, our research shows that up to eight hours per week is wasted effort (muda). Following the steps in this book can recover those hours and allow...

CCNA voice quick reference

By Michael Valentine

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CCNA Collaboration Official Cert Guide Library

By Michael H. Valentine, Jason Ball, Brian Morgan

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CCNA Voice 640 461 Official Cert Guide

By Michael Valentine, Jeremy Cioara

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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.