J. Gregory Keyes Books

The Charnel Prince

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“There is adventure and intrigue, swordplay and dark sorcery aplenty.”—Realms of Fantasy When the legendary Briar King awoke from his slumber, dark magics awoke with him and spread across the Kingd...

The Blood Knight

By J. Gregory Keyes

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“[A] sophisticated and intelligent high fantasy epic.”—Publishers WeeklyThe legendary Briar King has awakened, spreading madness and destruction across a land devastated by a royal family’s fall fr...

Rebirth: Star Wars Legends

By J. Gregory Keyes

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The Star Wars epic continues its dazzling space odyssey in The New Jedi Order–as Luke and Mara, Leia and Han, and others battle the mighty enemy from beyond the galactic rim.The brutal Yuuzhan Vong...

The Shadows of God

By J. Gregory Keyes

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The Infernal City: An Elder Scrolls Novel

By J. Gregory Keyes

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Based on the award-winning The Elder Scrolls, The Infernal City is the first of two exhilarating novels following events that continue the story from The Elder Scrolls IV: Oblivion, named 2006 Gam...

Edge of Victory I Conquest

By J. Gregory Keyes

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The Blackgod

By J. Gregory Keyes

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The Final Prophecy

By J. Gregory Keyes

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A Calculus of Angels

By J. Gregory Keyes

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The Psi Corps Trilogy Babylon 5

By J. Gregory Keyes

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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.