- The Four Gospels: A Study of Origins, Treating of the Manuscript Tradition, Sources, Authorship, & Dates
- The God Who Speaks
- The Buddha and the Christ: An Exploration of the Meaning of the Universe and of the Purpose of Human Life (The Bampton lectures for 1932)
- God And The Struggle For Existence
- Immortality : an essay in discovery coordinating scientific psychical and Biblical research