They were orphans, Chris and Saul - raised in a Philadelphia school for boys, bonded by friendship, and devoted to a mysterious man called Eliot.

Savage, a former Navy SEAL and American state-of-the-art security specialist. Akira, Japan's most brilliant executive protector and a master of the samurai arts. Their mission: the retrieval of Rachel Stone, a beautiful American woman whose ruthless billionaire husband is out to destroy her.

For 2,000 years a hidden conflict has been waged. Now it is bursting into the open - in a pitched battle over the very future of the planet. In the Amazon and in Africa, from oil spills to animal slaughters, the earth is being defiled, and two covert armies are locked in mortal conflict - with a woman reporter caught in the middle.

On his last combat deployment, Lt. Cmdr. James Reece's entire team was killed in an ambush that also claimed the lives of the aircrew sent in to rescue them. But when those dearest to him are murdered on the day of his homecoming, Reece discovers that this was not an act of war by a foreign enemy but a conspiracy that runs to the highest levels of government. Now, with no family and free from the military's command structure, Reece applies the lessons that he's learned in over a decade of constant warfare toward revenge.

Court Gentry is known as The Gray Man—a legend in the covert realm, moving silently from job to job, accomplishing the impossible, and then fading away. And he always hits his target. But there are forces more lethal than Gentry in the world. And in their eyes, Gentry has just outlived his usefulness. Now, he is going to prove that for him, there's no gray area between killing for a living-and killing to stay alive.