The following are books that I have found to be interesting and useful. Some have had direct influence on the present book, but all have had an influence on me.
Bateson, Gregory. Steps to an Ecology of Mind (New York: Ballantine, 1972).
Buber, Martin. I and Thou (Clark, 1937).
Campbell, Jeremy. Grammatical Man (New York: Simon and Schuster, 1983).
Campbell, Joseph. The Masks of God (Vols. 1-4) (New York: Viking Penguin, 1962).
Campbell, Joseph. The Hero with a Thousand Faces (Princeton, N.J.: Princeton Press, 1949).
Capra, Fritjof. The Tao of Physics (New York: Bantam Books, 1980).
Cassirer, Ernst. The Philosophy of Symbolic Forms (Vols. 1-4) (New Haven, Conn.: Yale University Press, 1955).
Collingwood, R. G. The Idea of ...