Marble Heart by C. J. Vincent

The God of War has never been a popular presence on Olympus. But his glowering looks and stern expressions have a much deeper cause.
Aloof and as changeable as the winds of conflict, Ares has always carried tragedy with him wherever he goes. To bring suffering is his destiny, his mother saw to that, but even the Lord of Swords must take time to breathe the sweet air. Even Ares must rest.
The God of War has fought against the prophecy for so long that it seemed impossible to bring him to heel. But there is more at work here – a secret that keeps him separate from the plight of his father, his uncles, and even his brothers.
Nikos is a man without a future, a college student without direction or ambition to do anything to take him away from his lonely island home. He’s listened to his fathers’ stories about the Olympian gods and their selfish ways since he was a child, and the mythology is as real to him as if it had been acted out in front of his face.
When the God of War is confronted with the truth about his destiny, what lengths must a mortal go to convince a God that sometimes Fate cannot be ignored? And what must a God do to ensure that his legacy is protected?