Sgt. Jack Coughlin Books

Shock factor
Shock factor

By Jack Coughlin

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A retired marine sniper and an award-winning journalist present an insider's assessment of America's sniper force to challenge popular misconceptions and pay tribute to the snipers who made pivotal...

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On Scope
On Scope

By Donald A. Davis, Sgt. Jack Coughlin

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In the crosshairs
In the crosshairs

By Jack Coughlin

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"The Central Intelligence Agency is under attack, and so is its top field operative, Kyle Swanson. The highly decorated former Marine Corps gunnery sergeant is attending the funeral of a friend whe...

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On Scope
On Scope

By Donald A. Davis, Sgt. Jack Coughlin

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Long shot
Long shot

By Jack Coughlin

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"A top Russian intelligence agent has defected to the West and the only man with whom he will speak is Kyle Swanson, who busted him out of the U.S. Marine Corps Scout/Sniper School years ago. The d...

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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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