Tutored by Aristotle, helpless witness to his father's assassination, and a brilliant, pioneering tactician, Alexander the Great had conquered the known world--and sealed his legacy as one of history's most remarkable rulers--by the age of 25. In the year 334 B.C., 20-year-old King Alexander of Macedonia decided to bring the farthest reaches of the world under one domain. Over the next 12 years, he led a grand army across more than 20,000 miles and eventually brought all of Asia under his contro...