Ryan O Sullivan Books

Turncoat

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"Turncoat follows the story of Duke, the world's worst superhero assassin, and his constant battle with his ex-wife-and-rival assassin, Sharon. Duke is always one step behind Sharon, constantly mis...

Void trip

By Ryan O Sullivan

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The story of Ana and Gabe, the last two humans left alive in the galaxy. They're low on fuel, they're low on food, and they're low on psychedelic space froot, but they're still determined to make i...

Dark Souls

By Anton Kokereve, Ryan O Sullivan

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Astonisher Vol. 3

By Ryan O Sullivan, Christopher J. Priest

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Twisted Dark

By Erol Debris, Seb Antoniou, Jake Elphick, Neil Gibson, Ryan O Sullivan

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Void trip

By Ryan O Sullivan

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Astonisher No. 13

By Al Barrionuevo, Ryan O Sullivan, Christopher J. Priest

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Fearscape Vol. 2

By Ryan O Sullivan, Andrea Mutti

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Fearscape Vol. 1

By Ryan O Sullivan, Andrea Mutti

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Warhammer 40 000

By Ryan O Sullivan

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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.