Mathematical Philosophy: A Study of Fate and Freedom; Lectures for Educated Laymen, Volume 2
Mathematical Philosophy: A Study of Fate and Freedom; Lectures for Educated Laymen, Volume 1
Science and religion, the rational and the superrational: an address delivered May 4, 1914 before the Phi Beta Kappa alumni in New York
The Human Worth of Rigorous Thinking: Essays and Addresses
Thinking about thinking