| Author | Title | Date |
| Oken, Alan | Complete Astrology | 1988 |
| Oken, Alan | Soul-Centered Astrology | 1990 |
| Olcott, Henry Steel | Inside the Occult: The True Story of Mde H.P. Blavatsky | 1975 |
| Ornstein, Robert E. | Nature of Human Consciousness: A book of readings | 1973 |
| Ornstein, Robert E. | Psychology of Consciousness | 1977 |
| Ouseley, S.G.J. | Colour Meditations | 1969 |
| Ouseley, S.G.J. | Power of the Rays: Science of Colour Healing | 1975 |
| Ouseley, S.G.J. | Science of the Aura (pamphlet) | 1968 |
| Ouspensky, P.D. | Fourth Way | 1975 |
| Ouspensky, P.D. | In Search of the Miraculous | 1970 |
| Ouspensky, P.D. | Psychology of Man's Possible Evolution | 1950 |
| Overstreet, Harry A. | Great Enterprise: Relating Ourselves to Our World | 1952 |
| Overstreet, Harry A. | Mature Mind | 1949 |
| Overstreet, Harry A. | Mind Alive | 1954 |
| Overstreet, Harry A. | Mind Goes Forth: The Drama of Understanding | 1956 |
| Overstreet, Harry A. | Understanding Fear | 1951 |
| Pagels, Elaine | Gnostic Gospels | 1979 |
| Pagels, Heinz R. | Cosmic Code: Quantum Physics, Language of Nature | 1982 |
| Parabola Magazine | Hierarchy, Vol. IX, No. 1, Jan. 1984 | 1984 |
| Parker, W.R. & St. Johns, E. | Prayer Can Change Your Life | 1958 |
| Parrish-Harra, Carol E. | New Dictionary of Spiritual Thought (expanded 2nd ed) | 2002 |
| Payne, P. & Bendit, L.J. | Psychic Sense | 1958 |
| Paz, Lew | Pushing Ultimates: Fundamentals of Self-Knowledge | 2006 |
| Pe, Del | Body Therapy Exercises & Inner Power Med. (DVD) | 2001 |
| Pe, Del | From Success to Fulfillment | 2004 |
| Pe, Del | Inner Powers to Maximize Your Performance 2 ed. | 2003 |
| Pe, Del | Namaskar Meditation (CD) | 2004 |
| Peace Pilgrim | Peace Pilgrim: her life and works in her own words | 1994 |
| Peace Pilgrim | Steps Toward Peace | 1993 |
| Peck, M. Scott | The Road Less Traveled | 1978 |
| Perls, F., et al. | Gestalt Therapy | 1965 |
| Perry, Whitall N. | Gurdjieff: In the Light of Tradition | 1978 |
| Plato | Five Great Dialogues | 1942 |
| Powell, Arthur E. | Astral Body | 1972 |
| Powell, Arthur E. | Causal Body and the Ego | 1978 |
| Powell, Arthur E. | Mental Body | 1967 |
| Powell, Arthur E. | The Solar System | 1957 |
| Powell, Robert | Significance of Hunab Ku & the Mayan Year 2012 (CD) | 2009 |
| Prabhavananda & Isherwood | Bhagavad-Gita | 1951 |
| Prabhavananda & Manchester | Upanishads | |
| Prasad, Rama | Nature's Finer Forces | 1947 |
| Prater, Burt | Family Masonic Education Workbook | 1993 |
| Prater, Rick | Bridge to Superconsciousness | 1999 |
| Pratt, James | On the Way to Zoraster's House (Esoteric Psychology) | 2007 |
| Progoff, Ira | Cloud of Unknowing | 1983 |
| Progoff, Ira | Death and Rebirth of Psychology | 1969 |
| Progoff, Ira | Depth Psychology and Modern Man | 1959 |
| Progoff, Ira | Jung's Psychology and its Social Meaning | 1955 |
| Progoff, Ira | Symbolic and the Real | 1963 |
| Pryse, James M. | Reincarnation in the New Testament | 1911 |
| Purucker, G. de | Golden Precepts of Esotericism | 1943 |
| Purucker, G. de | Occult Glossary | 1956 |
| Pythagoras | Golden Verses of Pythagoras and other fragments | 1919 |
