The Naked Edge

Once they were boyhood best friends, playing in the woods near their homes, pretending to be soldiers surviving behind enemy lines. Grownup, they belonged to Delta Force and later worked as protectors for the world's best security company. Now their lives have taken drastically different paths, pitting them against one another, forcing them to play their boyhood game again, this time to learn who dies. The survival of a great city hangs in the balance as two friends-turned-enemies hunt one another and discover that there's a line between predators and prey, a line that's called The Naked Edge. From Rambo-creator David Morrell, the father of the modern action novel, comes a gripping international thriller that you won't want to end.
"The sniper had a partner. That was a given. To do the job properly,
which meant not only making the hit but also escaping, the shooter needed eyes in the back of his head. All the time he sighted through the scope on his Remington .308 rifle, which he loved more than anything else in the world, he needed the freedom to concentrate only on the job at hand, an area of a few inches 700 yards away, and that meant he needed a spotter to concentrate on the objects around him: whether a threat was approaching from the side, whether a cloud was about to cast a shadow, whether something or someone was about to obscure the target. He needed a partner he could depend on, who shared his instincts, who knew what he was thinking. A lot of marriages weren't as close."