The prowler was at the window again. In my mind, I raised my gun and aimed it, but then I saw the weapon lying in my lap. Not even survival instinct could clear the fog filling my brain. I looked back at the window. The face was gone. A woman's face. I was sure of it. Would they use a woman to kill me? Of course. They were pragmatists. They used what worked.

Something scratched at my doorknob. Through the thickening haze I fought to aim my gun at the door. Something slammed against the wood. I got my finger on the trigger, but as my swimming brain transmitted the instruction to depress it, sleep annihilated consciousness like fingers snuffing a candle flame.

Andrew Fielding sat alone at his desk, furiously smoking a cigarette. His hands were shaking from a confrontation with Godin. It had happened the previous day, but Fielding had the habit of replaying such scenes in his mind, agonizing over how ineffectually he had stated his case, murmuring retorts he should have made at the time but had not.

The argument had been the result of weeks of frustra¬tion. Fielding didn't like arguments, not ones outside the realm of physics, anyway. He'd put off the meeting until the last possible moment. He pottered around his office, pondering one of the central riddles of quantum physics: how two particles fired simultaneously from the same source could arrive at the same destination at the same instant, even though one had to travel ten times as far as the other. It was like two 747s flying from New York to Los Angeles-one flying direct and the other having to fly south to Miami before turning west to Los Angeles- yet both touching down at LAX at the same moment. The 747 on the direct route flew at the speed of light, yet the plane that had to detour over Miami still reached L.A. at the same instant. Which meant that the second plane had flown faster than the speed of light. Which meant that Einstein's theory of Special Relativity was flawed. Possibly. Fielding spent a great deal of time thinking about this problem.