Frank Zarnowski Books

"This exploration of the ancient pentathlon explores the nature of the spectacle, the method of determining a victor, the five sub-events, and the order in which they occurred. It chronicles the ev...

American Work Sports

By Frank Zarnowski

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" For more than a century the American farm, factory and frontier provided opportunities for physical workers to display their skill, win a bet, brag or perhaps just have some fun. By examining the...

American Decathletes

By Frank Zarnowski

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Pentathlon of the Ancient World

By Frank Zarnowski

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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.