An Enquiry Concerning the Principles of Morals

Modern Skepticism: A Journey Through the Land of Doubt and Back Again, A Life Story and A Course of Lectures Delivered at the Request of the Christian Evidence Society

Modern Essays and Stories

Stolen Legacy

A New Century of Inventions: Being Designs & Descriptions of One Hundred Machines, Relating to Arts, Manufactures, & Domestic Life

The North Pole: Its Discovery in 1909 Under the Auspices of the Peary Arctic Club

The War on All Fronts: England's Effort: Letters to an American Friend

Sketch of the Reformation in England

Seneca Fiction, Legends, and Myths

Women, Family and the Russian Revolution

Trial of the Officers and Crew of the Privateer Savannah on the Charge of Piracy in the United States Circuit Court for the Southern District of New York

Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry

The Religious Spirit of the Slavs (1916) Sermons on Subjects Suggested by the War

Stories of Survival: The People of Ferramonti: Then and Now

History of South Africa: Racism, Apartheid, Colonialism, and Other Details

On the Law of War and Peace

On War and Principles of War (Complete)

On the Art of War

The Coming of the Fairies