The best books on the Crusades include The Crusades by Thomas Asbridge, God’s War, The Crusades Through Arab Eyes, Crusaders by Dan Jones, A History of the Crusades and The First Crusade by Peter Frankopan.

The best books on the Byzantine Empire include Byzantium by Judith Herrin, A Short History of Byzantium, Lost to the West, The New Roman Empire, 1453 and The Alexiad.

The best books on the Ottoman Empire include Osman’s Dream, Lords of the Horizons, The Ottomans by Marc David Baer, The Fall of the Ottomans, Empress of the East and My Name Is Red.

The best books on the Mongol Empire include Genghis Khan and the Making of the Modern World, The Mongols by David Morgan, The Mongol Conquests in World History, The Secret History of the Mongols and Khubilai Khan.

The best books on the Vikings include The Children of Ash and Elm, The Sea Wolves, The Vikings by Neil Oliver, River Kings, The Sagas of Icelanders and Norse Mythology.

The best books on Ancient Greece include The Histories by Herodotus, Thucydides’ History of the Peloponnesian War, Persian Fire, The Greeks by H.D.F. Kitto, Introducing the Ancient Greeks and The Odyssey.

The best books on Ancient Rome include SPQR, Rubicon, The Twelve Caesars, I, Claudius, Caesar: Life of a Colossus and The Decline and Fall of the Roman Empire.

The best books on Ancient Egypt include The Rise and Fall of Ancient Egypt, Temples, Tombs and Hieroglyphs, The Woman Who Would Be King, The Complete Tutankhamun, Ramesses and The Oxford History of Ancient Egypt.

The best books on the Inca Empire include The Last Days of the Incas, Turn Right at Machu Picchu, The Conquest of the Incas, The Incas by Terence D’Altroy, The Conquest of Peru and Lost City of the Incas.

The best books on the Maya include Breaking the Maya Code, The Maya by Michael D. Coe, Chronicle of the Maya Kings and Queens, A Forest of Kings, Jungle of Stone and The Ancient Maya.