* Psychology and Philosophy:
* "The Threshold of the Unseen" (1909)
* "The Mystery of Sleep" (1914)
* "The Psychology of the Unconscious" (1915)
* "The Soul and Its Mechanism" (1922)
* "The Nature of Dreams" (1922)
* "Man, the Maker" (1927)
* Religion and Spirituality:
* "The Inner Life" (1909)
* "The Vision of St. Teresa of Avila" (1914)
* "A New Psychology of the Christian Life" (1917)
* "The Christian Life: A Psychological Study" (1926)
* "The Spiritual World" (1930)
* "The Inner Life: Its Foundations, Development, and Fruits" (1933)
* Social Commentary and History:
* "The Temptation of Christ" (1915)
* "The World-Machine" (1917)
* "The Life of the Soul" (1923)
* "The Spirit of the Church" (1925)
* "The Soul of the World" (1928)
* "The Great Adventure" (1931)
He also wrote several works on the occult and the paranormal, including:
* "The Occult" (1920)
* "Psychic Phenomena" (1921)
* "The Haunting of St. Thomas's Church" (1924)
It's important to note that some of his works, particularly those dealing with the occult and paranormal, have been criticized for their lack of scientific rigor. However, his writings on psychology, religion, and spirituality remain influential and continue to be read today.