- The History of the Holy Mountain - 1962
- Notes from the Holy Mountain - 1971
- Sacred and Profane Beauty: The Holy Mountain and Orthodox Spirituality - 1979
- Athos: The Holy Mountain - 1984
- The Way of Life: The Prologue of St. John the Theologian - 1989
- In Search of the Ultimate: The Reign of God and Its Critics - 1992
- The Mountain of Silence: Monastic Life on Mount Athos - 1998
- The Light of My Life: Letters of Elder Paisios the Athonite - 1999
- The Way to God: The Philokalia and Orthodox Spiritual Tradition - 2000
- The Jesus Prayer: The History and Practice of the Jesus Prayer - 2001