Sicario (Hard Rain)

"In Hard Rain, Eisler's second novel, the lethal assassin John Rain is back. Half Japanese, half American, raised in both countries but at home in neither, Rain is trying to leave his life as a freelance assassin, but no one will just let him retire. With his military discipline and martial arts skills, and his talent for making death appear to have been of "natural causes," he is a potential asset - and a threat - to everyone." "After killing a CIA officer who had hunted him halfway around the globe, Rain plans his own disappearance, hoping to find the peace that has eluded him. But then his old nemesis from the Japanese FBI comes to him asking for one last 'favor': find and eliminate a killer at large, a creature without compassion or conscience." "It's soon clear that it is not just Japan's fragile balance of political power that's threatened, but also the lives of Rain's few friends, including a love from his past. To protect them, Rain must pursue his quarry into the heart of a war between the CIA and the Japanese mafia, where the distinctions between friend and foe, truth and deceit, are as murky as the rain-slicked streets of Tokyo."--Jacket.

After killing a CIA officer who had hunted him halfway around the globe. John Rain goes underground, hoping to disappear, seeking the peace that has eluded him.