URI: 
       The next few days are a blur of preparations. Before you know it, you 
       and Bruce are on a TWA jet heading for Rome on the first leg of the 
       trip to Cairo. On the plane, your uncle explains his plan to place 
       special instruments in a chamber under the center of the largest 
       pyramid at Giza. He hopes to test the pyramid's effect on the paths 
       of cosmic rays—rays made up of high-speed particles from space that 
       usually penetrate deep into the ground. "If my theory is correct," he 
       says, "these rays could be concentrated by the pyramid to produce an 
       unlimited amount of energy." While Bruce is talking, you notice that 
       a man nearby is straining to hear him. No doubt he's just curious. He 
       is strange-looking, though! In Rome you change to an Egyptair jet You 
       are startled to notice the same man from the other jet aboard your 
       Cairo-bound plane. "I will have lots of red tape to take care of at 
       the airport when we land," says Bruce. "Why don't you just breeze 
       through customs and take a cab to the Star and Crescent Hotel, where 
       we're staying? My assistant, Andrea, will be waiting there for you. 
       She can get you settled in our room while my equipment is unloaded 
       from the plane." As soon as you land, Bruce is off to the baggage 
       area, leaving you alone in a foreign land. As if that isn't enough, 
       the stranger from the plane appears and hands you a small, folded 
       piece of paper, then dashes toward the taxi stand outside the 
       terminal.
       
       Quickly you unfold the note. Scrawled in red ink are the words 
       "Beware the Sphinx." You have heard about the statue of the Sphinx 
       next to the Pyramids. But why should you beware of it? The thought 
       occurs to you that "sphinx" could be a code word and not refer to the 
       actual Sphinx at all. Maybe the note is a meaningless hoax. On the 
       other hand, it could spell danger for you and Bruce. You remember the 
       time you felt an urge to get off a bus in your hometown—just before 
       it was hit by a truck. Now you have a hunch that you should follow 
       this man.
       
       If you try to follow him,
   DIR turn to page 13.
       If you decide that it is wiser to go to your hotel,
   DIR go on to page 4.