Dean Koontz Books

The Servants of Twilight

By Edward Gorman

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The Bone Yard

By Ray Garton, Sheri S. Tepper, F. Paul Wilson

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The mask

By Edward Gorman

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"No one could understand why Colin and Roy were best friends. Colin was so shy; Roy was so popular. Colin was nervous around girls; Roy was a ladies' man. Colin was fascinated by Roy--and Roy was f...

Cold fire

By Dean Koontz

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The House of Thunder

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Hideaway

By Dean Koontz

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Cold Fire

By Dean Koontz

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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.