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Reference

A Reading List: Classic Public Domain Books on Mind and Spirit

By The Spiritual Science editors · 2026-10-10 · 5 min read

The books below are older works on mind and spirit that are in the public domain in the United States, which means free editions are easy to find. They range from philosophy and early psychology to New Thought and Hermetic writing. Including a book here does not mean we endorse its claims. Some are serious works of scholarship, some are sincere spiritual teaching, and some are period pieces best read with a critical eye. Copyright rules differ between countries, so readers outside the United States should check their local rules for specific editions and translations.

Ancient and Classical Sources

  • Meditations, Marcus Aurelius (written around 170 to 180 CE). The private notes of a Roman emperor practicing Stoic philosophy. Older English translations, such as George Long's from the nineteenth century, are freely available and still readable.
  • Enchiridion, Epictetus (compiled in the early second century CE). A short handbook of Stoic teaching recorded by his student Arrian. Its central idea, separating what is in our control from what is not, remains one of the most practical lessons in philosophy.
  • Thrice-Greatest Hermes, G. R. S. Mead (1906). A three volume English translation and study of Hermetic writings, including the Corpus Hermeticum. It is a useful way to compare the original Hermetic texts with later popular books that claim Hermetic roots.

American Transcendentalism

  • Nature, Ralph Waldo Emerson (1836). A short essay that became a founding text of Transcendentalism, arguing that nature reflects spirit and that individuals can experience the divine directly.
  • Essays: First Series, Ralph Waldo Emerson (1841). Includes "Self-Reliance" and "The Over-Soul," two essays that shaped American spiritual independence and later influenced New Thought writers.
  • Walden, Henry David Thoreau (1854). An account of two years living simply near Walden Pond. Its reflections on attention, simplicity and inner freedom are as relevant now as they were then.

Early Psychology and Psychical Research

  • The Principles of Psychology, William James (1890). A landmark of early psychology. Its chapters on attention, habit and the stream of thought are classics, and they are clearer than many modern textbooks.
  • The Will to Believe and Other Essays in Popular Philosophy, William James (1897). Essays on faith, evidence and the right to hold beliefs when the evidence is not settled. Essential for anyone thinking about how spirituality and reason fit together.
  • The Varieties of Religious Experience, William James (1902). Based on James's Gifford Lectures, it studies religious experience from a psychological point of view and includes a well known discussion of the "mind cure" movement.
  • Phantasms of the Living, Edmund Gurney, Frederic W. H. Myers and Frank Podmore (1886). An early large collection of reported cases of apparitions and telepathy from the Society for Psychical Research. It is historically important, though its methods would not meet modern standards.
  • Human Personality and Its Survival of Bodily Death, Frederic W. H. Myers (1903). Published after the author's death, it lays out his theory of a "subliminal self" and gathers evidence he believed pointed to survival. A key text in the history of consciousness studies.
  • The Interpretation of Dreams, Sigmund Freud (1899, title page dated 1900). Freud's theory of dreams as meaningful expressions of the unconscious. Many of its specific claims have not held up, but its influence on how we think about the mind is hard to overstate.
  • Cosmic Consciousness, Richard Maurice Bucke (1901). A Canadian psychiatrist's study of what he saw as a higher form of awareness, illustrated with historical examples. Speculative, but an early attempt to describe mystical experience systematically.
  • Mysticism, Evelyn Underhill (1911). A thorough study of the nature and stages of mystical experience, especially in the Christian tradition. Serious, well researched and still widely cited.

Esotericism and New Thought

  • Science and Health, Mary Baker Eddy (1875). The founding text of Christian Science. Worth reading to understand the mental healing movement of the late nineteenth century, whatever one makes of its claims about illness.
  • The Secret Doctrine, Helena Petrovna Blavatsky (1888). The central work of Theosophy, presenting a vast cosmology drawn from many sources. It is long and difficult, and best read as a historical document of modern esotericism.
  • In Tune with the Infinite, Ralph Waldo Trine (1897). One of the best selling New Thought books of its era, teaching that harmony with the divine brings health and peace. Gentle in tone and typical of the movement at its height.
  • As a Man Thinketh, James Allen (1903). A very short book arguing that character and circumstances grow out of thought. It is one of the most reprinted works in the self-help tradition.
  • The Edinburgh Lectures on Mental Science, Thomas Troward (1904). A British judge's attempt to set out a reasoned philosophy of mind and spirit. Troward influenced many later New Thought teachers.
  • Thought Vibration, or the Law of Attraction in the Thought World, William Walker Atkinson (1906). One of the early books to put the phrase "law of attraction" at the center of New Thought teaching. Useful for understanding where today's version came from.
  • The Kybalion, Three Initiates (1908). A short presentation of seven "Hermetic" principles, widely attributed to William Walker Atkinson. Best read alongside actual Hermetic texts to see how much of it is modern.
  • The Science of Getting Rich, Wallace D. Wattles (1910). A direct application of New Thought ideas to wealth. Read it as a historical source for modern manifestation teaching rather than as financial advice.
  • The Power of Concentration, Theron Q. Dumont (1916). A mind-training manual, widely believed to be by Atkinson under a pen name. Its simple attention exercises are the most useful part of the book.

How to Read These Books

Read older books in context. Notice when they were written, what science was known at the time, and who they were written for. Separate the history, the belief and the evidence: a book can be historically important and sincerely written while still making claims that have not held up. Many of these books are short, so reading two side by side, such as The Kybalion and Thrice-Greatest Hermes, or Thought Vibration and James's The Will to Believe, is one of the best ways to build your own informed view.