The Nathan K Collection: Volume 4 - Nathan K Collection, #4

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. And he's not the only one. THE NATHAN K COLLECTION From the start, Nathan has had one clear goal in mind. Gain his freedom. And he's had one clear obstacle along the way. Larkin. In this collection of four novels, Nathan finally gets a chance to win his goal.
But even immortality might not be enough to save him.