Christianity: What it is not, and What it is

Apology for Walking: Freedom in Nature and Wildness

Outrageous Openness: Letting the Divine Take the Lead

History of Printing and Paper-Making

New Seeds of Contemplation

Cleopatra: A Woman of History - Her Conquest of Caesar and Antony

Letters from the Earth: Uncensored Writings

Studies of Character and Temperament

The Very Worst Missionary: A Memoir or Whatever

Diogenes and the Cynic Philosophy

A Note On Sacred Trees

Among the Eskimos: History of their Habits and Religious Beliefs

Small Victories: Spotting Improbable Moments of Grace

Horses and their Domestication

The Enduring Authority of the Christian Scriptures

Thomas Edison: How He Succeeded

The Imitation of Christ

History of Universities