The First World War

The Secret Life of Hidden Places: Concealed Rooms, Clandestine Passageways, and the Curious Minds That Made Them

Two Treatises of Government

The Boer War

Fortune's Many Houses: A Victorian Visionary, a Noble Scottish Family, and a Lost Inheritance

Britain at Bay: The Epic Story of the Second World War, 1938-1941

Alexander the Great's Art of Strategy: The Timeless Leadership Lessons of History's Greatest Empire Builder

17 Carnations: The Royals, the Nazis, and the Biggest Cover-Up in History

The Day the Revolution Began: Reconsidering the Meaning of Jesus's Crucifixion

Jesus and the Powers: Christian Political Witness in an Age of Totalitarian Terror and Dysfunctional Democracies

The Republic

Old Glory: A Voyage Down the Mississippi

The Moth and the Mountain: A True Story of Love, War, and Everest

Coasting: A Private Journey

Father and Son: A memoir about family, the past and mortality

The Mirror of Fire and Dreaming

How God Became King: The Forgotten Story of the Gospels

Cover-Up Story

Sweetness #9: A Novel