Nathan K -- he can hold two souls in his body. If he dies, he loses one yet lives on with the other. As long as he replenishes his second soul, he cannot be killed. Nathan K is immortal.OCEAN OF DEATHWhen Nathan discovers two informants willing to turn against Larkin, his longtime rival, he has a chance to crack open his enemy's defenses. But nothing is ever simple for Nathan K. An assassin looking to make her name and a secret organization looking...