John Ritter Books

Desperado Who Stole Baseball

By John H. Ritter

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Under The Baseball Moon

By John Ritter, John H. Ritter

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Andy and Glory, two fifteen-year-olds from Ocean Beach, California, pursue their respective dreams of becoming a famous musician and a professional softball player.

The Brat Pack

By Sue Ritter, John H. Ritter

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Kids Claim to Fame

By Sue Ritter, John H. Ritter

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Choosing Up Sides.

By John H. Ritter

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In 1921, thirteen-year-old Luke finds himself torn between accepting his left-handedness or conforming to the belief of his preacher-father that such a condition is evil and must be overcome.

Over the Wall

By John Ritter, John H. Ritter

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Tyler's temper is out of control. If he isn't careful, he'll blow his chances of making the All-Star team and being noticed by a scout. But Tyler's coach, a Vietnam War veteran, has seen anger des...

Dave Barry s Funniest Stuff

By John H. Ritter, Dave Barry

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A Trace Element

By John H. Ritter

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Oregon State Penitentiary

By Diane L. Goeres Gardner

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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.