Plato's Academy and the Eternal Key

After the death of his grandfather, Charlie knows what it feels like to be lost and alone. Or does he? A puzzling letter leads Charlie down a shadowy staircase to the depths of the museum. Before Charlie knows it, he is whisked through time, transported to Ancient Greece. And nothing in this strange world is familiar. Passing the Oracle's bizarre tests is Charlie's only chance to return home but can he untangle Plato's ideas and stay alive? A stunning and unforgettable time travel adventure...