Unsolved Historical Mysteries

Hitler's Last Days: The Death of the Nazi Regime and the World's Most Notorious Dictator

Gladiator Science: Armor, Weapons, and Arena Combat

Who Was Albert Einstein?

Courageous Spies and International Intrigue of World War I

Who Was Marco Polo?

Medieval Knight Science: Armor, Weapons, and Siege Warfare

Who Was Abraham Lincoln?

Who Was Martin Luther King, Jr.?

Who Was Isaac Newton?

Bomb: The Race to Build--and Steal--the World's Most Dangerous Weapon

Stay Where You Are And Then Leave

Who Was Gandhi?

Who Was Annie Oakley?

Who Was Anne Frank?

The Plot to Kill Hitler: Dietrich Bonhoeffer: Pastor, Spy, Unlikely Hero

What Was Pearl Harbor?

The Day the World Went Nuclear: Dropping the Atom Bomb and the End of World War II in the Pacific

Children's Book of Philosophy

Who Was Genghis Khan?