Absolute Monarchs: A History of the Papacy, by John Julius Norwich
Roman Battle Tactics 109 BC-AD 313, by Ross Cowan
Late Roman Infantryman AD 236-565, by Simon MacDowall
On Roman Military Matters, by Flavius Vegetius Renatus, translated by Lieutenant John Clarke
Am I the only one who thinks "Eat your vegetables" when I see the name "Vegetius?"