Greg Alexander Books

A concise extension of the business classic Topgrading, targeted to sales managers Brad Smart's Topgrading has sold more than 150,000 copies since 1999, making it the definitive book for executives...

Making the Number

By Greg Alexander Aaron Bartels, Mike Drapeau

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The essential tool kit to achieve breakthrough sales performance improvements.Numbers don’t lie: 40 percent of all salespeople miss their targets each year. How can sales managers ensure thei...

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.