David A. Kelly Books

Ballpark Mysteries 7 The San Francisco Splash

By David A. Kelly

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Ballpark Mysteries 10

By David A. Kelly

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Tiger Trouble

By David A. Kelly

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Ballpark Mysteries: The Dugout boxed set (books 1-4)

By David A. Kelly

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Get ready for a curveball! Help Mike and Kate solve four Ballpark Mysteries in some of America’s favorite ballparks, collected together for the first time! Team up with baseball super-fans Mike a...

Ballpark Mysteries Super Special 4: The World Series Kids

By Mark Meyers, David A. Kelly

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Batter up! Get ready to watch the kids' baseball team from Cooperstown compete in this Super Special edition of the Ballpark Mysteries--fun, accessible early chapter books that cross baseball actio...

The Astro Outlaw Turtleback School Library Binding Edition Ballpark Mysteries

By David A. Kelly

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All Star Joker

By David A. Kelly

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The Capital Catch

By Mark Meyers, David A. Kelly

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The Cardinals Caper

By Mark Meyers, David A. Kelly

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Ballpark Mysteries Super Special 1

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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.