Gerard Brennan Books

Badass Horror
Welcome to the Octagon
Welcome to the Octagon

By Gerard Brennan

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The Point
The Point

By Gerard Brennan

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Guilt Rules All
Guilt Rules All
Point
Point

By Gerard Brennan

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Belfast Noir
Belfast Noir

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Lee Child, Eoin McNamee, and others explore the dark corners and alleyways of Belfast.

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Belfast Noir
Belfast Noir

By Adrian McKinty, Stuart Neville

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Wellness Doctrines
Undercover
Undercover

By Gerard Brennan

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Related Articles from our Blog

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.

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