Kevin Callahan Books

How to Play Baseball Better Than You Did Last Season
How to Play Baseball Better Than You Did Last Season

By Jonah Kalb

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An illustrated guide for young baseball players on improving playing technique and game strategy.

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To all my friends on shore and other plays
Tales from the weird zone
Tales from the weird zone

By Jim Razzi

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Presents five frightening tales that take place in a world between reality and fantasy called The Weird Zone.

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Early American furniture
Early American furniture

By Kevin Callahan

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Early American furniture
Early American furniture

By Kevin Callahan

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The Black Rose
The Black Rose

By Kevin Callahan

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Road Map
Road Map

By Kevin Paul Callahan

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Soul Space
Soul Space

By Kevin Callahan

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Tales from the Weird Zone
Evidence Based Practices for Teaching Students with Autism

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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.

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