Jeff Savage Books

Mark McGwire, home run king

By Jeff Savage

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Presents a biography of the St. Louis Cardinal slugger who broke Roger Maris' single-season home run record in 1998.

Danica Patrick Amazing Athletes

By Jeff Savage

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Sammy Sosa, home run hero

By Jeff Savage

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A biography of the Chicago Cubs outfielder known for hitting many home runs and doing humanitarian work in his native country, the Dominican Republic.

Julie Foudy

By Jeff Savage

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A biography of the young woman from southern California who starred at Stanford University and was a co-captain of the gold medal winning U.S. women's Olympic soccer team in 1996.

Jeff Gordon

By Jeff Savage

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Biography of the young stock car driver who has won three NASCAR championships and more than forty races in four years.

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.