Two very popular yet accurate books on the pyramids are lorwerth Edwards, The Pyramids of Egypt (New York: Viking, 1980) and Ahmed Fakhry, The Pyramids (Chicago: Univ. of Chicago Press, 1969). For more information on various aspects of Egypt’s Old Kingdom period (c. 3000–2200 B.C.E.), see Walter B. Emery, Archaic Egypt (New York: Viking/Penguin, 1961).