Only Alexander the Great would have the audacity to attempt such a daring siege--the fortified island city of Tyre seems invincible, but his Macedonian troops are inspired and determined, and the young Alexander has a secret weapon--a machine created for the destruction of cities: the catapult. If Tyre falls, it will be a pivotal victory in Alexander's quest for a new empire--a key stop on a march that will cover more than 10,000 miles and span three continents.