The Third Stone

Johanna Milford Haggerity is just ending a trip to Egypt with her husband Harry. While visiting the Valley of the Kings she discovers an odd square piece rock in a rubble pile at a tourist stop outside of Cairo. She buys the rock. Returning to Chicago her and her husband resume their jobs. Harry concentrates on a new Sonic Drill his company has developed. Johanna return to her job as a Professor of Antiquity at the Field Museum. She starts recieving strange messages and phone calls about her rock. The calls eventually lead to a disturbing event and to meeting someone that has a second rock. The meeting ends up with the formation of an odd group of people. They set out to find a third rock. The three rocks all have strange marking and are the clues to a hidden teasure. The search takes them from Chicago to the high Andes Mountains and back to the flat lands of the midwest United States; along the way they are accosted by someone trying to steal the rocks