A Day in September: The Battle of Antietam and the World It Left Behind

Air Power: The Men, Machines, and Ideas That Revolutionized War, from Kitty Hawk to Iraq

Code Warriors: NSA's Codebreakers and the Secret Intelligence War Against the Soviet Union

Perilous Fight

Journey to the Edge of Reason: The Life of Kurt Gödel

Her Majesty's Spymaster: Elizabeth I, Sir Francis Walsingham, and the Birth of Modern Espionage

The Nature of Horses

Oliver Wendell Holmes: A Life in War, Law, and Ideas

The Character of Cats

The Truth About Dogs: The Ancestry, Social Conventions, Mental Habits and Moral Fibre of Canis familiaris