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Maor, Eli. e: The Story of a Number.Princeton: Princeton University Press, 1994.
Blatner, David. The Joy of Pi. New York: Walker and Co, 1997.
Beckman, Peter. History of Pi.New York: St. Martin's Press, 1976.
Hofstadter, Douglas. Godel, Escher, Bach: An Eternal Golden Braid.New York: Basic Books, 1999.
Hofstadter, Douglas. Metamagical Themas: Questing the Essence of Mind and Pattern. New York: Basic Books, 1996.
Dunham, William. Journey Through Genius. New York: Penguin USA, 1991.