Klass, David Books

Whirlwind

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In this environmental thriller, one boy is in a race against the Dark Lord to save the rain forests and the future.KLIATTAGERANGE: Ages 12 to 18. In this action-packed ecological thriller, Jack, ou...

Timelock

By David Klass, David Klass, Klass, David

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Is this the end of Jack Danielson?Jack Danielson has spent the last year risking everything to save the oceans and the Amazon. Now, heâs more than ready to get back to a normal life and spend som...

You Don'T Know Me

By David Klass, Klass, David

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You think you know John? Well, let’s see . . . What bathroom fixture did his father have in mind at his birth? What amphibian plagues John in band? Does algebra have a use, besides torture? Who or...

Home Of The Braves

By David Klass, Klass, David

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at The Start Of His Senior Year, Joe Brickman Expects To Be The Star Of His High School Soccer Team And Finally Work Up The Courage To Ask Out His Neighbor, Kristine. Things Don't Turn Out As Expec...

Firestorm: The Caretaker Trilogy: Book 1

By David Klass, Klass, David

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After learning that he has been sent from the future for a special purpose, eighteen-year-old Jack receives help from an unusual dog and a shape-shifting female fighter. His mother is not his mothe...

Whirlwind: The Caretaker Trilogy: Book 2

By David Klass, Klass, David

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Timelock: The Caretaker Trilogy: Book 3

By David Klass, Klass, David

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In Timelock, the thrilling finale to the Caretaker Trilogy, the end of life as we know it has arrived, and history will be made -- or lost -- at the hands of one young hero. Jack Danielson has spen...

Dark Angel

By David Klass, Klass, David

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I don't know if you've ever held a secret so powerful that it could make someone you love stop caring for you in the blink of an eye. If you ever find yourself in possession of such a secret, you m...

Stuck On Earth

By David Klass, Klass, David

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Ketchvar III’s mission is simple: travel to Planet Earth, inhabit the body of an average teenager, and determine if the human race should be annihilated. And so Ketchvar—who, to human eyes, looks j...

Wrestling With Honor

By David Klass, Klass, David

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"Lodestar books." Champion high school wrestler Ron Woods faces a soul-searching season when he refuses to retake a mandatory drug test he has failed. This decision affects every area of his life,...

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.