Mark Greaney Books

Tom Clancy Commander in Chief

By Scott Brick, Mark Greaney

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Command Authority

By Tom Clancy, Mark Greaney

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"One of Tom Clancy's most storied characters, Dominic Caruso, is the only one who can stop America's secrets from falling into enemy hands in this blockbuster new novel written by Clancy's longtime...

Tom Clancy full force and effect

By Mark Greaney

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"A North Korean ICBM crashes into the Sea of Japan. A veteran CIA officer is murdered in Ho Chi Minh City, and a package of forged documents goes missing. The pieces are there, but assembling the p...

True faith and allegiance

By Mark Greaney

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"The #1 New York Times-bestselling series is back with the most shocking revelation of all. After years of facing international threats, President Jack Ryan learns that the greatest dangers always...

Dead Eye

By Mark Greaney

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Ex-CIA master assassin Court Gentry gets hit with a blast from the past in the fourth Gray Man novel from #1 New York Times bestselling author Mark Greaney.Court Gentry has always prided himself on...

Locked On

By Tom Clancy

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Command Authority

By Tom Clancy

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In this Jack Ryan thriller, #1 New York Times bestselling author Tom Clancy delivers an electrifying story of intrigue, power, and a family with two generations of heroes….Decades ago, as a young C...

The Gray Man

By Mark Greaney

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THE FIRST GRAY MAN NOVEL FROM #1 NEW YORK TIMES BESTSELLING AUTHOR MARK GREANEY—Now a Netflix Film Starring Ryan Gosling and Chris Evans“Hard, fast, and unflinching—exactly what a thriller should b...

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.