210 Complete Evolution
———. Microcosmos: Four Billion Years of Evolution from Our Microbial Ancestors. Berkeley: University of California Press, 1997.
———. Symbiotic Planet: A New Look at Evolution. New York: Basic Books, 1998.
———. What Is Life? Berkeley: University of California Press, 2000.
Sapp, Jan. Evolution by Association: A History of Symbiosis. New York: Oxford University Press, 1999.