Matthew Quirk Books

The Night Agent

By Matthew Quirk

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The Night Agent

By Matthew Quirk

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The 500: A Novel

By Matthew Quirk

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The Directive

By Matthew Quirk

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The Fords are an old DC family with deep and powerful connections--to petty thieves, to guys who know how to get their hands on specialized weapons, and to forgers who can, for the right price, pro...

The 500

By Matthew Quirk

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Mike Ford turned himself around and worked his way into Harvard Law School. Now he is employed by the Davies Group, Washington's most high-powered and well-respected strategic consulting firm that...

Dead Man Switch

By Matthew Quirk

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The suspicious deaths of two members of an elite undercover military team are investigated by Special Ops legend Captain John Hayes, who is horrified to discover that his protégé, a brilliant assas...

Dead Man Switch

By Matthew Quirk

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The 500

By Matthew Quirk

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Hour of the Assassin

By Matthew Quirk

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Cold barrel zero

By Matthew Quirk

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John Hayes is a Special Operations legend who went rogue on a deep-cover mission and betrayed his own soldiers. Disgraced and on the run, he returns to the United States to take revenge on his accu...

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.