A bastard. A hostage. A soldier. An assassin. In the crucible of a fracturing empire and a forbidden faith, guided by one extraordinary woman, a boy becomes the man who will change the world.

Rome, AD 281. On the Rostra, a twelve-year-old boy watches the triumphal procession of Emperor Probus and waits for his father to notice him. When a hand rises from the column of generals, the boy's heart leaps—but Constantius Chlorus is waving at the crowd. He does not see his son.

So begins the story of the man history will call Constantine the Great. But that man is decades away. First comes the boy: sent to a military academy in Rome, left to wander the capital alone, swept into a vision of a god that he can neither explain nor forget. Then comes the young soldier: drinking too much, bedding the wrong women, trying not to live in his father’s shadow. Then the hostage: shipped east by the emperor Diocletian, killing Persians in the mountains of Armenia, watching his dearest friends tortured for a religion his mother loves and he cannot bring himself to share. Finally, the would-be assassin—of his own father.

Through it all, the constant is Helena. A concubine of obscure provincial origin, she saves a plague-ridden city, shelters the persecuted, and carries an outlawed faith with a serenity that reshapes everyone around her, including the son she is raising for a destiny that neither of them fully understands.

Spanning three decades and half the known world, Son of Helena is a novel about power and its costs, a dying empire and a rising faith, and the extraordinary woman at the center of one of history’s most consequential lives.