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Short list of books/lecture cycles by Rudolf Steiner relevant to the subject matter of this Cycle
Books:
Knowledge of Higher Worlds
Cosmic Memory
Theosophy
Outline of Occult Science
Lecture Cycles:
Theosophy of the Rosicrucian
Universe, Earth and Man
The Gospel of St John
The Apocalypse
The Christ Impulse and the Development of Ego Consciousness
The Spiritual Hierarchies
Spiritual Beings in the Heavenly Bodies and in the Kingdoms of Nature
The Occult Movement in the Nineteenth Century
Out of print books and lectures in typescript may be borrowed from the library at Rudolf Steiner House, 35 Park Road, London NW 1.