The following resources have proven to be immensely helpful breadcrumbs through the perennial way wilderness for me over a nearly-40-year odyssey. May they also cast some light for each of you.
| Source | Author | Genre |
| A Course in Miracles | Foundation for Inner Peace | Sacred Texts |
| A New Earth | Eckhart Tolle | Spiritual |
| Answer to Job | C.G. Jung | Psychology |
| Beyond Good and Evil | Friedrich Nietsche | Philosophy |
| Cosmic Consciousness | Richard Bucke | Spiritual |
| Critique of Pure Reason | Immanuel Kant | Philosophy |
| Dark Night of the Soul | St. John of the Cross | Spiritual |
| Ecclesiastes | Holy Bible | Sacred Texts |
| Energy Medicine | Donna Eden | Health/Healing |
| Esoteric Anatomy | Bruce Burger | Health/Healing |
| Essays and Aphorisms | Arthur Shopenhaeur | Philosophy |
| Finite and Infinite Games | J. Carse | Philosophy |
| Freedom from the Known | J. Krishnamurti | Spiritual |
| Gnosis of the Cosmic Christ | Tau Malachi | Spiritual |
| Gnostic Healing | Tau Malachi | Spiritual |
| Gospel of John | Holy Bible | Sacred Texts |
| I | David Hawkins | Spiritual |
| I Say Unto You: Talks on the Sayings of Jesus | Bhagwan Shree Rajneesh | Spiritual |
| In Tune wth the Infinite | Trine | Classics |
| Letters on Yoga I | Sri Aurobindo | Spiritual |
| Letters on Yoga II | Sri Aurobindo | Spiritual |
| Letters on Yoga III | Sri Aurobindo | Spiritual |
| Living Gnosis: A Practical Guide to Gnostic Christianity | Tau Malachi | Spiritual |
| Living with Kundalini | Gopi Krishna | Spiritual |
| Pathways through to Space | Franklin Merrell-Wolff | Spiritual |
| Pistis Sophia | G.R.S. Meade | Sacred Texts |
| Pistis Sophia: A Coptic Gnostic text with Commentary | J.J. Hurtak | Spiritual |
| Polarity Therapy: Complete Collected Works Volume I | Dr. Randolf Stone | Health/Healing |
| Polarity Therapy: Complete Collected Works Volume II | Dr. Randolf Stone | Health/Healing |
| Power vs. Force | David Hawkins | Spiritual |
| Psalms | Holy Bible | Sacred Texts |
| Psyche and Substance | Edward Whitmont | Health/Healing |
| Psychosynthesis | Roberto Assaglioni | Psychology |
| Putting On the Mind of Christ | Jim Marion | Spiritual |
| Selected Essays of Ralph Waldo Emerson | Emerson | Classics |
| Selected Poems of Rainer Marie Rilke | Rilke | Classics |
| Son of Man | Andrew Harvey | Spiritual |
| Stillness Speaks | Eckhart Tolle | Spiritual |
| Synoptic Gospels | Holy Bible | Sacred Texts |
| Tao te Ching | Lao Tzu | Philosophy |
| The Body Electric | Robert Becker | Health/Healing |
| The Alchemy of Healing | Edward Whitmont | Health/Healing |
| The Art of Living | Epictetus | Philosophy |
| The Awakening of Intelligence | J. Krishnamurti | Spiritual |
| The Black Butterfly | Richard Moss | Spiritual |
| The Book of the Vision Quest | Meredith/Little | Experiential |
| The Book: An Introduction to the Teachings of Rajneesh Series I | Bhagwan Shree Rajneesh | Spiritual |
| The Book: An Introduction to the Teachings of Rajneesh Series II | Bhagwan Shree Rajneesh | Spiritual |
| The Book: An Introduction to the Teachings of Rajneesh Series III | Bhagwan Shree Rajneesh | Spiritual |
| The Cloud of Unknowing | Unknown | Classics |
| The Enlightenment Process | Judith Blackstone | Psychology |
| The Eye of the I | David Hawkins | Spiritual |
| The First and Last Freedom | J. Krishnamurti | Spiritual |
| The Gnostic Bible | Editors: Barnstone, Meyer | Sacred Texts |
| The Gnostic Paul | Elaine Pagels | Spiritual |
| The Gospel of St. Thomas | Tau Malachi | Spiritual |
| The Hero with a Thousand Faces | Joseph Campbell | Mythology |
| The I Ching Workbook | RL Wing | Classics |
| The I That is We | Richard Moss | Spiritual |
| The Integral Yoga | Sri Aurobindo | Spiritual |
| The Knee of Listening | Adi Da | Spiritual |
| The Life Divine | Sri Aurobindo | Spiritual |
| The Mandala of Being | Richard Moss | Spiritual |
| The Masks of God: Creative Mythology | Joseph Campbell | Mythology |
| The Masks of God: Occidental Mythology | Joseph Campbell | Mythology |
| The Masks of God: Oriental Mythology | Joseph Campbell | Mythology |
| The Mother | Sri Aurobindo | Spiritual |
| The Mustard Seed: Sayings from the Gospel of Thomas | Bhagwan Shree Rajneesh | Spiritual |
| The Nag Hammadi Library | Editor: James Robinson | Sacred Texts |
| The Outsider | Colin Wilson | Psychology |
| The Perennial Philosophy | Aldous Huxley | Philosophy |
| The Philosophy of Consciousness without an Object | Franklin Merrell-Wolff | Philosophy |
| The Portable Emerson | Editor: Bale | Classics |
| The Portable Jung | Editor: Campbell | Psychology |
| The Power of Now | Eckhart Tolle | Spiritual |
| The Return of the Mother | Andrew Harvey | Spiritual |
| The Road Less Traveled | M. Scott Peck | Psychology |
| The Second Miracle | Richard Moss | Spiritual |
| The Spiritual Wisdom of Marcus Aurelius | Editor: | Philosophy |
| The Subtle Self | Judith Blackstone | Psychology |
| The Upanishads | Sacred Texts | |
| The Varieties of Religious Experience | William James | Psychology |
| Think on These Things | J. Krishnamurti | Spiritual |
| Vibrational Medicine | Richard Gerber | Health/Healing |
| Walden/Civil Disobedience | HD Thoreau | Classics |
Via Perennis 