- On the Right and Wrong Use of the Bible: Including a Discussion of Current and Mischievous Fads of Bible Misinterpretation (1913)
- The Holy Inquisition: A Study in the Abuse of Law and Power (1919)
- Mexico, the Wonderland of the South (1925)
- The Riddle of the Sphinx, or Evolution vs. Darwinism (1929)
- The Light of Egypt: The Science of Angels Revealed by the Hieroglyphs (1930)
- What Really Happened at Bethlehem (1932)
- The Lost Continent: The Origin of the Phoenicians and the Celts (1934)
- The Ancient Egyptians and Their Influence upon the Civilization of Europe: A New Theory (1936)
- The Chaldean Magi and the Mysteries of the Zodiac (1937)
- How the Great Pyramid Was Built: A New Theory (1938)
- The Great Pyramid: Its Symbolism and Secrets (1939)
- Who Were the Atlanteans? And Where Was Atlantis? (1940)
- Egypt's Place in Universal History (1941)
- The Sacred Papyrus of Amen-Em-Apt: Being an Account of the Mysteries of Ancient Egyptian Initiation, as Described in the Oldest Religious Papyrus in the World (1943)
- The Bible in India (1945)
- The Twelve Apostles of the Lamb (1947)
- The Life and Prophecies of Nostradamus (1948)
- How Jesus Became God: A Historical Enqiery (1950)
- The Holy Blood: The Grail Tradition in History, Legend and Literature (1952)
- The Seven Mysteries of the Earth: A Study of Man's Origins, Nature and Destiny (1956)
- The Last of the Druids: A Study in the Survival of Pagan Traditions (1961)
- The Old Egyptian Faith (1962)
- The Egyptian Book of the Dead: The Greatest and Most Influential Sacred Book of the Ancient World (1964)
- The Secret Tradition: The Inner Teachings of the Master Freemasons and the Rosicrucians (1965)
- The Rosicrucian Enlightenment (1967)
- The Golden Age of Osiris (1969)
- The Wisdom of the Ancients (1971)
- The Mystery of Man: The Riddle of the Human Soul and Its Destiny (1973)
- The Life and Teachings of the Masters: Jesus, St. Paul, St. John, St. Francis of Assisi, St. Teresa of Avila, and St. Thomas Aquinas (1975)
- The Secret Teachings of the Masters (1977)
- The Path to Illumination (1979)
- The Divine Plan: The Ultimate Destiny of Man and the Universe (1981)
Articles:
- "Atlantis: The Mystery Unveiled" (1933)
- "The Great Pyramid: A New Theory" (1934)
- "Egypt's Place in Universal History" (1935)
- "The Bible in India" (1936)
- "The Lost Continent: The Origin of the Phoenicians and the Celts" (1937)
- "The Light of Egypt: The Science of Angels Revealed by the Hieroglyphs" (1938)
- "The Holy Inquisition: A Study in the Abuse of Law and Power" (1939)
- "The Ancient Egyptians and Their Influence upon the Civilization of Europe: A New Theory" (1940)
- "The Chaldea Magi and the Mysteries of the Zodiac" (1941)
- "The Sacred Papyrus of Amen-Em-Apt: Being an Account of the Mysteries of Ancient Egyptian Initiation, as Described in the Oldest Religious Papyrus in the World" (1942)
- "The Twelve Apostles of the Lamb" (1943)
- "Who Were the Atlanteans? And Where Was Atlantis?" (1944)
- "The Life and Prophecies of Nostradamus" (1945)
- "How Jesus Became God: A Historical Enquiry" (1946)
- "The Holy Blood: The Grail Tradition in History, Legend and Literature" (1947)
- "The Seven Mysteries of the Earth: A Study of Man's Origins, Nature and Destiny" (1948)
- "The Last of the Druids: A Study in the Survival of Pagan Traditions" (1949)
- "The Old Egyptian Faith" (1950)
- "The Egyptian Book of the Dead: The Greatest and Most Influential Sacred Book of the Ancient World" (1951)
- "The Secret Tradition: The Inner Teachings of the Master Freemasons and the Rosicrucians" (1952)
- "The Rosicrucian Enlightenment" (1953)
- "The Golden Age of Osiris" (1954)
- "The Wisdom of the Ancients" (1955)
- "The Mystery of Man: The Riddle of the Human Soul and Its Destiny" (1956)
- "The Life and Teachings of the Masters: Jesus, St. Paul, St. John, St. Francis of Assisi, St. Teresa of Avila, and St. Thomas Aquinas" (1957)
- "The Secret Teachings of the Masters" (1958)
- "The Path to Illumination" (1959)
- "The Divine Plan: The Ultimate Destiny of Man and the Universe" (1960)