Kelley Armstrong Books

Otherworld Chills

By Kelley Armstrong

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Omens

By Kelley Armstrong

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Olivia Taylor Jones, 24, seems to have the perfect life. The only daughter of a wealthy Chicago family, she has an Ivy League education and is engaged to a handsome young tech-firm CEO with politic...

Visions

By Kelley Armstrong

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Visions: The Cainsville Series

By Kelley Armstrong

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Deceptions

By Kelley Armstrong

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Exit Strategy

By Kelley Armstrong

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Werewolves

By Kelley Armstrong

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Frostbitten

By Kelley Armstrong

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Smart, sexy, supernatural—the men and women of the Otherworld live and love, fight and die, among us. Unseen and unsuspected, this realm of witches, ghosts, and werewolves is now threatened with ex...

A Darkness Absolute

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Spellcasters

By Kelley Armstrong

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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.