[mmanfrin]

Pressfield's books are great. I'd additionally recommend following up the Virtues of War with The Afghan Campaign -- which is also about Alexander, but focused entirely on the time he spent in Afghanistan. There are some astounding parallels to today.

Then, when you're done, Gates of Fire is a classic (Pressfield's novel on the Battle of Thermopylae). Tides of War is on the Peloponnesian War that followed.

[grey-area]

A war like no other is also a classic on the Peloponnesian War; likewise surprsingly relevant to present day politics and wars.