George Galdorisi Books

Tom Clancy's Op-center

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When terrorists detonate bombs in sports stadiums around the country leaving men, women and children dead or mutilated, the President executes an emergency order to bring back Op-Center and thwart...

Tom Clancy s Op Center Into the Fire

By Dick Couch, George Galdorisi

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Tom Clancy s Op Center Into the Fire

By Dick Couch, George Galdorisi, Tom Clancy, Steve R. Pieczenik

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Tom Clancy s Op center

By George Galdorisi

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"ISIS reigns supreme in huge swathes of Iraq and Syria and poses a threat to stability in the Middle East. When an American airstrike kills the ISIS leader's only son, he vows revenge. He discovers...

Tom Clancy s Op Center

By Jeff Rovin

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"The brutal murder of an undercover agent reveals a plot to incite a full-fledged war between Russia and Ukraine" -- Back cover.

Tom Clancy s Op center

By Dick Couch

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When terrorists detonate bombs in sports stadiums around the country leaving men, women and children dead or mutilated, the President executes an emergency order to bring back Op-Center and thwart...

Tom Clancy s Op Center Into the Fire

By Dick Couch, George Galdorisi, Henry Leyva, Steve R. Pieczenik

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Into the Fire

By Dick Couch, George Galdorisi, Henry Leyva

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Tom Clancy s Op Center

By George Galdorisi, Jeff Rovin, Henry Leyva

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Tom Clancy s Op Center Dark Zone

By George Galdorisi, Jeff Rovin, Henry Leyva, Tom Clancy, Steve R. Pieczenik

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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.