There were many books, articles and videos watched and read during the writing of this novel. Here are some of the more important and influential materials for you to research:

Brugger, K. [1977]. The Chronicle of Akakor. New York: Delacorte Press Childress, D. H. [1999] Lost Cities & Ancient Mysteries of South America. Kempton, Illinois: Adventures Unlimited Press Gardner, L. [2003]. Lost Secrets of the Sacred Ark. London: HarperCollins Grann, D. [2005]. The Lost City of Z. New York: Doubleday Greene, B. [2003]. The Elegant Universe. New York: W.W. Norton & Co. Grist, S. [2001]. StanGrist.com Adventures Into The Unknown. http://www.stangrist.com/tunnels.htm Raposo, F. [1753, translation by Mrs. Richard Burton 1865]. Document 512. National Library of Rio de Janeiro MacQuarrie, K. [2007]. The Last Days of the Incas. New York: Simon & Schuster Von Däniken, E. [1969]. Chariots of the Gods. New York: Souvenir Press Von Däniken, E. [1970]. Gods From Outer Space. New York: Souvenir Press Von Däniken, E. [1973]. The Gold of The Gods. New York: Souvenir Press Von Däniken, E. [1973]. In Search of the Ancient Gods. New York: Souvenir Press Wilkins, H.T. [1952]. Secret Cities of Old South America. Kempton, Illinois: Adventures Unlimited Press Wilkins, H. T. [1956]. Mysteries of Ancient South America. USA: The Citidel Press Ancient Astronauts television series on the History Channel.   DISCLAIMER: This novel is a work of fiction. Names, characters, organizations, places, events
and incidents are either a product of the author’s imagination or used fictitiously. Any
resemblance to actual persons, living or dead, events, or locales is entirely coincidental.