1. "Decline and Fall of the Roman Empire" by Edward Gibbon
2. "The Rise and Fall of the Third Reich" by William L. Shirer
3. "The Ottoman Empire: A Short History" by Suraiya Faroqhi
4. "Empires: The Logic of World Domination from Ancient Rome to the United States" by Herfried Münkler
5. "Empires of the Sea: The Siege of Malta, the Battle of Lepanto, and the Contest for the Center of the World" by Roger Crowley
6. "The British Empire" by Philip J. Haythornthwaite
7. "The Empire of the Steppes: A History of Central Asia" by René Grousset
8. "The Persian Empire: A Corpus of Sources from the Achaemenid Period" by Amélie Kuhrt and others
9. "The Mongol Empire: Genghis Khan, His Heirs and the Founding of Modern China" by Timothy May
10. "The Spanish Empire: A Historical Encyclopedia" by H. Michael Tarver and Emily Slape
11. "The Empire of Necessity: Slavery, Freedom, and Deception in the New World" by Greg Grandin
12. "The Holy Roman Empire: A Short History" by Derek Beales
13. "Empire of Cotton: A Global History" by Sven Beckert
14. "The Russian Empire: A Multi-ethnic History" by Andreas Kappeler
15. "The French Empire at War, 1940-1945" by Ian Sumner.