The china jiggled slightly when the car went over a bump, but sipping tea gave the backseat an odd atmosphere of domesticity. Although Mrs. Brewster had never had children, she enjoyed acting like a wealthy aunt who might spoil a favorite nephew. Over the last few days, he had watched her charm and flatter men from a dozen different countries. Men talked too much around Mrs. Brewster, and that was one of the sources of her power. Michael was determined not to make that mistake.

“So, Michael-are you enjoying yourself?”

“I guess so. I’ve never been to Europe before.”

“What’s your evaluation of our three friends in Hamburg?”

“Albrecht and Stoltz are on your side. Gunter Hoffman is skeptical.”

“I don’t know how you can assume that. Dr. Hoffman didn’t say more than six words during the entire meeting.”

“The pupils of his eyes contracted slightly whenever you spoke about the Shadow Program. Hoffman is some kind of scientist, right? Maybe he doesn’t understand the political and social implications of the program.”

“Now, Michael. You need to be more charitable toward scientists.” Mrs. Brewster resumed her stitching. “I got my degree in physics at Cambridge and considered science as a career.”

“So what happened?”

“In my final year at university, I began to read about something called chaos theory-the study of erratic behavior in nonlinear dynamic systems. The chattering classes have gotten hold of this term and use it in complete ignorance to justify romantic anarchism. But scientists know that even mathematical chaos is deterministic-in other words, what occurs in the future is caused by a past sequence of events.”

“And you wanted to influence those events?”

Mrs. Brewster looked up from her stitching. “You are a very clever young man. Let’s just say that I realized that nature prefers structure. The world will still have to deal with hurricanes and airplane crashes and other unpredictable disasters. But if we establish our Virtual Panopticon, human society will evolve in the right direction.”

They passed a sign for Berlin and the car seemed to go a little faster. There was no speed limit on this road. “Perhaps you could call Nathan Boone after the meeting at the computer center,” Michael said. “I’d like to know if he’s found out anything about my father.”

“Of course.” Mrs. Brewster wrote a memo to herself on her computer. “And let’s say Mr. Boone is successful and we find your father. What do you intend to say to him?”

“The world is going through a major technological change. The Panopticon is inevitable. He needs to realize that fact and help the Brethren achieve its goals.”

“Brilliant. That’s brilliant.” She looked up from the keyboard. “We don’t need any new ideas from Travelers. We just need to follow the rules.”

BY THE TIME Michael finished his second cup of tea, they were in Berlin, driving down the tree-lined boulevard of Unter den Linden. The few groups of tourists on the street looked overwhelmed by the baroque and neoclassical buildings. Mrs. Brewster pointed out a stack of enormous books with the names of German authors on the spines. The memorial had been set up in Bebelplatz, where the Nazis had emptied the libraries and burned books in the 1930s.

“Many more people live in Tokyo or New York,” she explained. “Berlin always feels like a city too large for its population.”

“I guess a lot of buildings were destroyed during World War Two.”

“Quite right. And the Russians blew up much of what survived. But that unpleasant past has been swept away.”

The Mercedes turned left at the Brandenburg Gate and followed the edge of a park toward Potsdamer Platz. The wall that had once divided the city had vanished, but its presence still lingered in the area. When the wall was torn down, the empty space created a real estate opportunity. The death zone was now a distinct strip of skyscrapers designed in a bland modern style.

A long avenue called Voss Strasse had once been the site of the Reich Chancellery during World War II. Much of the area was fenced off and under construction, but the driver parked in front of a massive five-story building that looked like it came from an earlier era.

“This was originally an office building for the German Reich Railway,” Mrs. Brewster explained. “When the wall came down, the Brethren gained control of the property.”

They got out of the car and approached the computer center. The building’s outer walls were defaced with graffiti, and most of the windows were covered with metal security shields, but Michael could see traces of a grand nineteenth-century facade. There were scrolled cornices and the faces of Greek gods carved above the large bay windows that faced the street. From the outside, the building was like an expensive limousine that had been stripped and dumped down a ravine.

“There are two sections to this building,” Mrs. Brewster explained. “We’re going to be in the public area first, so be discreet.”

She approached a windowless steel door guarded by a surveillance camera. There was a small plastic sign to one side that announced that the building was the headquarters of a company called Personal Customer.

“Is this a British company?” Michael asked.

“No. It’s quite German.” Mrs. Brewster pushed the door buzzer. “Lars recommended that we give it an English name. It makes the staff think that they’re involved with something modern and international.”

The door clicked and they stepped into a brightly lit reception area. A young woman in her twenties with rings in her ears, lips, and nose looked up at them and smiled. “Welcome to Personal Customer. May I help you?”

“I’m Mrs. Brewster and this is Mr. Corrigan. We’re technical consultants here to see the computer. I do believe Mr. Reichhardt knows we’re coming today.”

“Yes. Of course.” The young woman handed Mrs. Brewster a sealed envelope. “You go to the-”

“I know, dear. I’ve been here before.”

They walked over to an elevator next to a conference room with glass walls. A group of company employees-most of them in their thirties-were sitting around a large table eating lunch and talking.

Mrs. Brewster ripped open the envelope, took out a plastic card, and waved it at the elevator’s sensor. The door glided open, they stepped into the elevator, and she waved the card a second time. “We’re going down to the basement. That’s the only entrance to the tower.”

“Is it okay to ask a question?”

“Yes. We’re out of the public area.”

“What do the employees think they’re doing?”

“Oh, it’s all perfectly legitimate. They’re told that Personal Customer is a cutting-edge marketing firm that is collecting demographic data. Of course, advertising to groups of people has become completely old-fashioned. In the future, all advertising will be directed toward each individual consumer. When you see a billboard in the street, it will sense the RFID chip on your key chain and flash your name. The energetic young people you just saw are busy finding every possible source of data about Berliners and feeding it into the computer.”

The elevator door opened and they stepped into a large basement without interior walls. Michael thought that the massive room looked like a factory without workers. It was filled with machinery and communication equipment. “That’s the backup power generator,” Mrs. Brewster said, pointing to the left. “That’s the air conditioner and filtration system because, apparently, our computer doesn’t favor polluted air.”

A white pathway had been painted on the floor, and they followed it to the other end of the room. Although the machinery was impressive, Michael was still curious about the people he had seen in the conference room. “So the employees don’t know that they’re helping establish the Shadow Program?”