George Castle Books

Baseball and the Media

By George Castle

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The 1969 Cubs

By Fergie Jenkins, George Castle

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The 1969 Cubs

By Fergie Jenkins, George Castle, John Hanley

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Throwbacks

By George B. Castle

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"Despite its many troubles, baseball still maintains a strong allure. Our love affair with the national pastime continues today thanks in no small part to players who hold fast to old-school values...

I Remember Harry Caray

By George Castle, Rich Wolfe

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Sammy Sosa

By George Castle

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Sammy Sosa

By George Castle

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The I 55 Series

By George Castle, Jim Rygelski

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I Remember Harry Caray

By George Castle, Rich Wolfe

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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.