Reference Books

• The Jews of Khazaria (Kevin Brook)
• The Blue Guide to Istanbul (John Ferry)
• The Blue Guide to Jordan (Rollin and Steely)
• Let's Go: Turkey (Semra Mesulam)
• Chronicle of the Chinese Emperors (Anne Paludian)
• The Late Roman Army (Southern & Dixon)
• World Religions (Ed. Geoffrey Parrinder)
• The Roman Engineers (L.A. and J.A. Hamey)
• Osprey: Rome's Enemies ~ The Desert Frontier (Nicolle)
• Osprey: Romano-Byzantine Armies (4th-9th C.) (Nicolle)
• Osprey: Yarmuk 636 AD (Nicolle)
• Osprey: Rome's Enemies ~ Parthians and Sassanid Persia (Wilcox)
• Osprey: Byzantine Armies (866-1118) (Heath)
• Osprey: Rome's Enemies ~ Germans and Dacians (Wilcox)
• Osprey: Rome's Enemies ~ Gaels and Celts (Wilcox)
• Arcana Mundi (Georg Luck)
• Roman Arabia (Bowerstock)
• The Persians (Bausani)
• A Popular Dictionary of Islam (Netton)
• The Romans (Christ)
• The Koran (Penguin Books paperback)
• The Art of War (Sun Tzu)
• History Begins At Sumer (Samuel Noah Kramer)
• Empire of the Steppes (Grousset)
• The Thirteenth Tribe: The Khazar Empire and Its Heritage (Koestler)

Associated Fiction

If you like Oath of Empire, it's very likely that you'll like these books:

• Lindsey Davis' Falco series.
• Rubicon (Steven Saylor)
• Murder in Macedon (Anna Apostolu)
• The Iliad and the Odyssey (Homer, via Robert Fagles ~ a fabulous translation)

Atlases

• Penguin Historical Atlas of Ancient Rome (Scarre)
• Atlas of the Roman World (Cornell & Matthews)

Web-Sites

• The conveniently useful Fictional Rome.
• The big KHAZARIA.COM web-site with a ton of info about the Khazar realm.
• A translation of Ibn Fadlan's account of his journey amongst the Rus / Varangians in 931 CE.

People

• Chris Cornuelle (the Sassanid Empire)
• Betsy Hasman (marriage, birth and death in Classical Rome)
• Melissa Giffords (life in Classical Rome)
• Colin Dunnigan (the late Roman and Byzantine armies)