In addition to his extensive lecturing Rudolf Steiner shared the results of his spiritual research in written works, many of which underwent several revisions as he sought the clarity and precision that epitomize his approach to spiritual science. Steiner saw four of his books as fundamental to the recovery of human dignity, freedom, and wisdom: The Philosophy of Freedom; Theosophy; An Outline of Occult Science; and Knowledge of the Higher Worlds and Its Attainment. See below for information about the reissues of these four basic books, as well as descriptions of other written works of special interest.

• Intuitive Thinking as a Spiritual Path: A Philosophy of Freedom
• How to Know Higher Worlds: A Modern Path of Initiation
• How to Know Higher Worlds
• Outline of Esoteric Science
• Outline of Occult Science
• Theosophy: An Introduction to Supersensible Knowledge of the World and the Destination of Man
• Stages of Higher Knowledge
• Anthroposophy: Fragment
• Mysticism at the Dawn of a Modern Age
• Toward Imagination
• Truth & Knowledge: Introduction to "Philosophy of Spiritual Activity"
• Christianity as Mystical Fact
• Spiritual Guidance of the Individual & Humanity: Some Results of Spiritual-Scientific Research into
• Cosmic Memory, Prehistory of Earth & Man: Atlantis & Lemuria