David A. Kelly Books

MVP 4: The Basketball Blowout

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From the author of the Ballpark Mysteries comes the coolest sports club around—the Most Valuable Players! The MVP club needs to raise money for their basketball tournament. At first, they think...

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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Ballpark Mysteries 15: The Baltimore Bandit

By David A. Kelly Illustrated By Mark Meyers

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Batter up! Baseball action and exciting whodunits star in this chapter book series! Next up is Baltimore!Mike and Kate's next mystery is legendary! The great pitching legend Babe Ruth's first team...

Ballpark Mysteries 15

By David A. Kelly

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Time out

By David A. Kelly

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Babe Ruth and the Baseball Curse (Totally True Adventures)

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Before 1918, the Boston Red Sox were unstoppable. They won World Series after World Series, thanks in part to their charismatic pitcher-slugger Babe Ruth. But some people on the Red Sox felt the Ba...

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.