Beneath the Unseen Sky

Previously

…The game had just gotten deadly. Mary Miller, the girl who vanished, was caught in a web spun by her own father and the shadowy players of the digital underworld. She had set out to win, but now, Harding had to race against time to find her before the game ended not with a victory, but with a tragic, permanent silence. The anonymous note writer had been right; Mary was playing a dangerous game. And the stakes, Harding now understood, were her very life.