| Author | Title | Date |
| Campbell, Bruce F. | Ancient Wisdom Revived | 1980 |
| Capra, Fritjof | Tao of Physics | 1975 |
| Capra, Fritjof | Turning Point | 1982 |
| Cayce, Edgar | Atlantis: Fact or Fiction? (pamphlet) | 1962 |
| Cayce, Edgar | Auras (pamphlet) | 1963 |
| Cayce, Edgar | Edgar Cayce's Story of Karma (Woodward, M.A.) | 1971 |
| Cayce, Edgar | Twenty-two Gems, Stones and Metals (pamphlet) | 1960 |
| Cayce, Hugh Lynn | Venture Inward | 1964 |
| Cedercrans, Lucille | Ashramic Group Life (booklet) | 1997 |
| Cedercrans, Lucille | Creative Process of Internalization (booklet) | 2004 |
| Cedercrans, Lucille | Creative Thinking | 2001 |
| Cedercrans, Lucille | Disciple and Economy. | 2002 |
| Cedercrans, Lucille | How to Study the Nature of the Soul (booklet) | 1997 |
| Cedercrans, Lucille | Laboratory of the Soul (booklet) | 1997 |
| Cedercrans, Lucille | Leadership Training | 2003 |
| Cedercrans, Lucille | Nature of the Soul | 1993 |
| Cedercrans, Lucille | Path of Service (booklet) | 2002 |
| Cedercrans, Lucille | Soul and Its Instrument | 1995 |
| Cedercrans, Lucille | Synthetic Ashram (booklet) | 1997 |
| Challoner, H.K. & Northover | Antidote to Fear | 1963 |
| Challoner, H.K. & Northover | Out of Chaos | 1967 |
| Challoner, H.K. | Path of Healing | 1982 |
| Challoner, H.K. | Watchers of the Seven Spheres | 1933 |
| Challoner, H.K. | What of Tomorrow? The Problem of Fear | 1976 |
| Challoner, H.K. | Wheel of Rebirth | 1969 |
| Chaney, Earlyne | Lost Secrets of the Mystery Schools | 1992 |
| Chaney, Earlyne | The Madonna and the Coming Light | 1993 |
| Chaney, Robert | The Essenes and Their Ancient Mysteries | 1968 |
| Chaney, Robert | The Mystic Mantra: Om Mani Padme Aum | 1999 |
| Chaney, Robert | Visits to the Manger: Enlightening Parables | 1996 |
| Chatterji, Mohini | Bhagavad Gita | 1960 |
| Chaumette, Yves | Peace Means Action. | 2001 |
| Chaumette, Yves | Source of Consciousness; an experiment approach | 2000 |
| Chinmoy, Sri | Everest - Aspiration | 1987 |
| Chinmoy, Sri | Kundalini - The Mother Power | 1992 |
| Chinmoy, Sri | My Lord's Secrets Revealed | 1998 |
| Cirlot, J.E. | Dictionary of Symbols | 1962 |
| Collin, Rodney | Theory of Celestial Influence | 1975 |
| Collins, Mabel | Light on the Path | 1949 |
| Collins, Mabel | When the Sun Moves Northward | 1948 |
| Confucius | Wisdom of Confucius (Lin Yutang, transl.) | 1943 |
| Constas, Robert | Death Does Not Exist (booklet) | 1979 |
| Conze, Edward (ed.) | Buddhist Texts Through the Ages | 1954 |
| Coomaraswamy, Ananda K. | Hinduism and Buddhism | 1957 |
| Cosgrove, Eugene Milne | High Walk of Discipleship | 1945 |
| Cosgrove, Eugene Milne | Letters to a Disciple | 1935 |
| Cosgrove, Eugene Milne | Science of the Initiates | 1934 |
| Cousins, Norman | Anatomy of an Illness | 1979 |
| Cousins, Norman | Celebration of Life: Immortality and Infinity | 1974 |
| Crampton, Martha | Psychosynthesis: key aspects theory/practice (bklt) | 1977 |
| Crawford, Ina | Guide to the Mysteries | 1990 |
| Crème, Benjamin | Maitreya's Mission | 1990 |
| Cruden, Alexander | Complete Concordance to Holy Scriptures | undated |
| Csikszentmihalyi, Mihaly | Flow: The Psychology of Optimal Experience | 2008 |
| Dabu, Dastur Khurshed S. | Message of Zarathustra: Manual of Zoroastrianism | 1959 |
| Dalai Lama | The Art of Happiness | 1998 |
| Dalton | Tables of Houses (Astrology) | |
| Daly, H.E. & Cobb, J.B. Jr. | For the Common Good | 1994 |
| Das, Bhagavan | Science of the Sacred Word (Pranava Vada) (pdf on CD) | |
| Davidson, Gordon | Being the Open Door for the Reappearance (talk on CD) | 2006 |
| Davidson, William M. | Cardinal Cross: X-ray of the Soul (pamphlet) | |
| Davidson, William M. | Proven Methods of Judging Horoscopes (pamphlet) | |
| Davis, James | Astrology: Esoteric and Psychological | 1976 |
| Davis, James & Raifsnider, J. | Astrology of the Seven Rays | 1977 |
| Davis, James | Meditations on Planets in Signs | 2000 |
| Davis, James | Seven Faces of Man - Astrological Types | 1980 |
| Davis, Lola A. | Toward a World Religion for the New Age | 1983 |
| Demotte, Charles | Inner Side of History | 1997 |
| DeRohan, Ceanne | Original Cause | 1986 |
| DeRohan, Ceanne | Right Use of Will | 1984 |
| Dhiravamsa, V.R. | New Approach to Buddhism | 1972 |
| Diamond, Louise | Peace Book | 2001 |
| Doane, Doris Chase | Time Changes in the USA (Astrology) | |
| Dossey, Larry | Meaning and Medicine | 1991 |
| Dossey, Larry | Recovering the Soul | 1989 |
| Dossey, Larry | Prayer is Good Medicine | 1996 |
