George Gmelch Books

To Shorten the Road

By George Gmelch

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Baseball without Borders

By George Gmelch

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In the Ballpark

By George Gmelch, J. J. Weiner

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Inside Pitch

By George Gmelch

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Playing with Tigers

By George Gmelch

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"In 1965 George Gmelch signed a contract to play professional baseball with the Detroit Tigers organization. Growing up sheltered in an all-white, affluent San Francisco suburb, he knew little of t...

Baseball Beyond Our Borders

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The Irish tinkers

By George Gmelch

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Urban Life

By George Gmelch

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Urban Life

By George Gmelch, Walter P. Zenner

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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.