The Olympic Conspiracy

Sosi thinks he is cursed - each month at the full moon, he can shed his skin and change his shape. But when his brother Theron is injured during training, Sosi is persuaded to take his place in the Olympic Games. Yet even though he has copied Theron's body, Sosi cannot run as fast as an Olympic athlete, and only the winner of the Boys' Sprint can carry the torch to light the sacred flame in the Temple of Zeus that has the power to protect Greece from her enemies.

With the Persians targeting ...