David Klass Books

Timelock: The Caretaker Trilogy: Book 3

By David Klass

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Home of the Braves

By David Klass

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Eighteen-year-old Joe, captain of the soccer team, is dismayed when a hotshot player shows up from Brazil and threatens to take over both the team and the girl whom Joe hopes to date.

Dark Angel

By David Klass

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When his older brother is released from prison, seventeen-year-old Jeff's family secret is revealed, causing upheaval in his home, school, and love life.

You Don't Know Me

By David Klass

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Fourteen-year-old John creates alternative realities in his mind as he tries to deal with his mother's abusive boyfriend, his crush on a beautiful, but shallow classmate and other problems at school.

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.