Persian Fire
Rubicon: The Last Years of the Roman Republic
The Forge of Christendom: The End of Days and the Epic Rise of the West
Dominion: How the Christian Revolution Remade the World
Dynasty: The Rise and Fall of the House of Caesar
In God's Path: The Arab Conquests and the Creation of an Islamic Empire (Ancient Warfare and Civilization)
Did Muhammad Exist?: An Inquiry into Islam's Obscure Origins