Some old, some new, but all informative.

Aivanhov, O.M. Man’s Two Natures, Human and Divine. 1985

Aivanhov, O.M. True Alchemy or the Quest for Perfection. 1988

Aivanhov, O. M. Man, Master of His Destiny. 1989

Aivanhov, O. M. The Powers of Thought. 2000

Almaas, A.H. The Inner Journey Home: Soul’s Realization of the Unity of Reality. 2004

Barks, Coleman. The Essential Rumi. 1995

Barks, Coleman. Rumi: The Book of Love. 2005

Berg, P.S. The Essential Zohar: The Source of Kabbalistic Wisdom. 2002

Bhardwaj, Prachi. 18 Nayyirah Waheed Short Poems That Will Leave You In A Maze Of Emotions. 2016

Bierhorst, John. The Sacred Path: Spells, Prayers and Power Songs of the American Indians. 1984

Bly, Robert and Lewisohn, Leonard. The Angels Knocking on the Tavern Door: Thirty Poems of Hafez. 2008

Bolton, Robert. People Skills. 1986

Campbell, Joseph. The Power of Myth. 1988

Carse, David. Perfect Brilliant Stillness: Beyond the Individual Self. 2006

Chambers, Oswald. My Utmost For His Highest. 1992

Chodron, Pema. No Time To Lose. 2007

Chodron, Pema. Comfortable With Uncertainty. 2008

Conway, Timothy. Varieties of Nondual Realization: Divine Play as One/Many. 2006

Costeines, Michael. What Enlightenment Means: A Qualitative Study of Nondual Consciousness as Experienced by Teachers of Nondual Wisdom. Unpublished doctoral dissertation, Institute of Transpersonal Psychology, Palo Alto, CA, 2009.

Cunningham, Lori B. The Mandala Book: Patterns of the Universe. 2010

Deshpande, M.S. (Ed.). The Way to God: Selected Writings from Mahatma Gandhi. 2009

Eaton, Charles. The Book of Hadith. 2008

Fadiman, J. and Frager, R. (Eds.). Essential Sufism. 1997

Feinstein, David and Krippner, Stanley. Personal Mythology: The Psychology of Your Evolving Self. 1988

Ferrer, Jorge. Revisioning Transpersonal Theory: A Participatory Vision of Human Spirituality. 2002

Ford-Grabowsky, Mary. Prayers for All People. 1995

Gendlin, Eugene. Focusing-Oriented Psychotherapy. 1996

Goode, Greg. Standing As Awareness: The Direct Path. 2009

Goode, Greg. The Direct Path: A User Guide. 2012

Grof, Stanislav. The Adventure of Self-Discovery: Dimensions of Consciousness and New Perspectives in Psychotherapy and Inner Exploration. 1988

Grof, Stanislav and Grof, Christina. The Stormy Search for the Self: A Guide to Personal Growth Through Transformational Crisis. 1990

Hagen, Steven. Why the World Doesn’t Seem to Make Sense. 2012

Hampden-Turner, Charles. Maps of the Mind. 1982

Hattiangdi, Gopal. Aphorisms from the Rig-Veda. 2002

Hawkins, David. The Eye of the I: From Which Nothing is Hidden. 2001

Hawkins, David. Transcending the Levels of Consciousness: The Stairway to Enlightenment. 2006

Hawkins, David. Along the Path to Enlightenment. 2011

Helminski, Kabir (Ed.). The Pocket Rumi. 2008.

Hultkrantz, Ake. Soul and Native Americans. 1997

Huxley, Aldous. The Perennial Philosophy. 1945

Ingerman, Sandra. Soul Retrieval. 1991

Janis, Sharon. Spirituality for Dummies. 2000

Job, Rueben and Shawchuck, Norman. A Guide to Prayer for Ministers and Other Servants. 1983

Kubler-Ross, Elisabeth. On Death and Dying. 1969

Ladinsky, Daniel. The Gift: Poems by Hafiz. 1999

Ladinsky, Daniel. Love Poems From God. 2002

Ladinsky, Daniel. A Year With Hafiz: Daily Contemplations. 2011

Laude, Patrick. Is Not Beauty Its Own Reward?. Parabola, v.35, #4. 2010

Leonard, George and Murphy, Michael. The Life We Are Given. 1995

Mabey, Juliet. God’s Big Book of Virtues. 1998

Maisel, Eric. The Atheist’s Way: Living Well Without Gods. 2009

Maslow, Abraham. Motivation and Personality. 1970

Maslow, Abraham. Toward a Psychology of Being. 1968

McCasland, David (Ed.). The Quotable Oswald Chambers. 2008

Moss, Richard. The I That is We: Awakening to Higher Energies Through Unconditional Love. 1981

Pelikan, Jaroslav (Ed.). Sacred Writings. 1992

Phipps, Carter. Evolutionaries: Unlocking the Spiritual and Cultural Potential of Science’s Greatest Idea. 2012

Prather, Hugh. I Touch the Earth, the Earth Touches Me. 1972

Prather, Hugh. Notes to Myself. 1970

Radhakrishnan, S. Indian Philosophy (2nd. Edition). 2008

Renu, Ma and Tabachnick, Anand. Fire Without Fuel: The Aphorisms of Baba Hari Dass. 1986

Ricard, Matthieu. Altruism. 2015

Roberts, Bernadette. The Path to No-Self. 1991

Roberts, Bernadette. The Experience of No-Self. 1993

Roberts, Elizabeth and Amidon, Elias. Earth Prayers from Around the World. 1991

Roberts, Jane. Seth Speaks: The Eternal Validity of the Soul. 1972

Roberts, Jane. Adventures in Consciousness: An Introduction to Aspect Psychology. 1975

Roberts, Jane. Seth, Dreams and Projection of Consciousness. 1986

Schaef, Anne. Escape From Intimacy. 1990

Seligman, Martin. Authentic Happiness: Using the New Positive Psychology to Realize Your Potential for Lasting Fulfillment. 2002

Smith, Paul. Integral Christianity: The Spirit’s Call to Evolve. 2012

Spira, Rupert. The Transparency of Things: Contemplating the Nature of Experience. 2008

Tanner, Wilda. The Mystical, Magical, Marvelous World of Dreams. 1989

Tedeschi, R.G., Park, C.L., and Calhoun, L.G. Posttraumatic Growth: Positive Changes in the Aftermath of Crisis. 1998

Tolle, Eckhart. The Power of Now: A Guide to Spiritual Enlightenment. 1999

Trungpa, Chogyam. Cutting Through Spiritual Materialism. 1973

Tulku, Tarthang. Elegant Sayings. 1977

Van de Castle, Robert. Our Dreaming Mind. 1994

Wade, Jenny. Changes of Mind: A Holonomic Theory of the Evolution of Consciousness. 1996

Ware, Corinne. Discover Your Spiritual Type. 1995

Warren, Rick. The Purpose Driven Life. 2002

Welwood, John. Double Vision: Duality and Nonduality in Human Experience. In J.J. Prendergast, P. Fenner, and S. Krystal. The Sacred Mirror: Nondual Wisdom and Psychotherapy. 2003

Wilber, Ken. Sex, Ecology, Spirituality: The Spirit of Evolution. 1995

Wilber, Ken. Integral Psychology. 2000

Wilber, Ken. Integral Spirituality. 2006

Wilber, Ken. The Integral Vision. 2007

Wilber, Ken. Integral Meditation. 2016

Wilber, Ken. The Religion of Tomorrow. 2017

Williamson, Marianne. Everyday Grace. 2002

Yogananda, Paramahansa. The Divine Romance. 1992

This list will continue to evolve, additions made as I remember good reads, and as I discover the new leading edge contributions to the field. Also, should you have any questions about these titles please contact me and I’ll provide you any further information you may need.