Stephen Coonts & Jim DeFelice 
Deep Black: Darkzone [EPUB ebook] 

In a secluded headquarters on the other side of the globe, a terrorist mission is underway – a plan to set of an underwater explosion so great, with such a hellish force, that it could shift the very foundation of the earth’s surface, causing untold calamity and world-wide disaster. The terrorists call it God’s Revenge A nuclear weapon has gone missing. Small in size, it packs up to ten times the kilotons that exploded over Hiroshima. It’s now in the wrong hands, ready to detonate a world war of unfathomable proportions.In the top-secret headquarters of the National Security Agency, a small cadre of special agents form Deep Black, a team designed to bring a techno-edge to covert operations and eliminate the cyber-threats to world peace. This is Charlie Dean’s world – an NSA ex-Marine sniper now enlisted to stop the unthinkable. But when his suspicions of a traitor in his shadow become frighteningly true, Dean’s race against time could mean the end of the free world.