Ralph Pezzullo Books

The Walk-In

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Gary Berntsen, longtime CIA operative and the field commander who cornered Osama Bin Laden in Afghanistan, writing with award-winning novelist Ralph Pezzullo, offers in this edge-of-the-seat thrill...

The walk in

By Gary Berntsen

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The walk in

By Gary Berntsen

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Jawbreaker

By Gary Berntsen

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In Jawbreaker Gary Berntsen, until recently one of the CIA’s most decorated officers, comes out from under cover for the first time to describe his no-holds-barred pursuit of Osama bin Laden and al...

Hunt the Wolf

By Ralph Pezzullo, Don Mann

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Hunt the wolf

By Don Mann

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SEAL Team Six

By Ralph Pezzullo, Don Mann

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SEAL Team Six

By Ralph Pezzullo, Don Mann

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SEAL Team Six

By Ralph Pezzullo, Don Mann

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SEAL Team Six

By Ralph Pezzullo, Don Mann

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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.