A great deal of research went into the making of Riddles of the Sphinx. Here's a list of some of the books that we found especially useful in learning about the Sphinx, the Giza Plateau, and ancient Egypt. Many of them are geared toward a general audience and most were written or edited by scholars who appear in our film.
Hawass, Zahi. The Secrets of the Sphinx: Restoration Past and Present. Cairo: The American University in Cairo Press, 1998.
Hawass, Zahi. Mountains of the Pharaohs: The Untold Story of the Pyramid Builders. New York: Doubleday, 2006.
Lehner, Mark. The Complete Pyramids: Solving the Ancient Mysteries. New York: Thames and Hudson, 1997.
O'Connor, David. Abydos: Egypt's First Pharaohs and the Cult of Osiris. New York: Thames & Hudson, 2009.
Szpakowska, Kasia ed. Through a Glass Darkly: Magic, Dreams, and Prophecy in Ancient Egypt. Swansea: The Classical Press of Wales, 2006.
Szpakowska, Kasia. Behind Closed Eyes: Dreams and Nightmares in Ancient Egypt. Swansea: The Classical Press of Wales, 2003.
Zivie-Coche, Christiane. Sphinx: History of a Monument. Ithaca: Cornell University Press, 1997.