Alan Ryan Books

The Penguin Book of Vampire Stories
Cast a cold eye.
Cast a cold eye.

By Alan Ryan

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The Philosophy of John Stuart Mill
The Philosophy of John Stuart Mill
Haunting Women
Haunting Women

By Alan Ryan

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Quadriphobia
Quadriphobia

By Alan Ryan

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The bones wizard
The bones wizard

By Alan Ryan

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Night Visions: In The Blood
Night Visions: In The Blood

By Tanith Lee, Steve Rasnic Tem, Gregory Manchess, Charles L. Grant, Alan Ryan

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A collection of eighteen horror tales by three noted writers includes "Friends in Dark Places," "Poor Thing," "Dark Shapes in the Road," and "The Vampire Lover"

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Halloween Horrors
Halloween Horrors

By Alan Ryan

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Panther
Panther

By Alan Ryan

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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.

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