Robert E. Vardeman Books

Road to the stars

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Accompanying his scientist parents on an exploratory voyage to another star system, seventeen-year-old Cliff Macklin discovers the ruins of an alien culture.

Dark Legacy

By Robert E. Vardeman

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Swords of Raemllyn

By Robert E. Vardeman

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God of War

By Matthew Woodring Stover

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Offering deeper insights into the critically acclaimed God of War® franchise, this novel returns us to the dark world of ancient Greek mythology explored in the heart-pounding action of God of War...

Masters of space

By Robert E. Vardeman

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Masters of Space 2

By Robert E. Vardeman

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A plague in paradise

By Robert E. Vardeman

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Ancient Heavens War of the Powers Robert E. Vardeman

By Robert E. Vardeman

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The Screaming Knife

By Robert E. Vardeman

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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.