"Do it, for Christ's sake," Shelton muttered.

Backle whispered, "I mean it. I'll turn my back on this one."

Gillette watched the data flow past hypnotically. His hands went to the keys. He felt everyone's eyes on him.

But then Bishop asked in a troubled voice, "Wait. Why didn't he just go offline? Why did he encrypt? That doesn't make sense."

"Oh, Jesus," Gillette said. And he knew the answer to that question immediately. He swiveled around and pointed to a gray box on the wall; a red b.u.t.ton rose prominently from the middle of it. "Hit the scram switch! Now!" he cried to Stephen Miller, who was closest to it.

Miller glanced at the switch then back to Gillette. "Why?"

The hacker leapt up, sending his chair flying behind him. He made a dive for the b.u.t.ton. But it was too late. Before he could push it there was a grinding sound from the main box of the CCU computer and the monitors of every machine in the room turned solid blue as the system failed - the notorious "blue screen of death."

Bishop and Shelton leapt back as sparks shot from one of the vents on the box. Choking smoke and fumes began to fill the room.

"Christ almighty..." Mott stepped clear of the machine.

The hacker slapped the scram switch with his palm and the power went off; halon gas shot into the computer housing and extinguished the flames.

"What the h.e.l.l happened?" Shelton asked.

Gillette muttered angrily, "That's why Phate encrypted his data but stayed online - so he could send our system a bomb."

"What'd he do?" Bishop asked.

The hacker shrugged. "I'd say he sent a command that shut down the cooling fan and then ordered the hard drive head to a sector on the disk that doesn't exist. That jammed the drive motor and it overheated."

Bishop surveyed the smoldering box. He said to Miller, "I want to be up and running again in a half hour. Take care of that, will you?"

Miller said doubtfully, "I don't know what kind of hardware central services has in inventory. They're pretty back-logged. Last time it took a couple of days to get a replacement drive, let alone a machine. The thing is--"

"No." Bishop said, furious. "A half hour."

The pear-shaped man's eyes scanned the floor. He nodded toward some small personal computers. "We could probably do a mini-network with those and reload the backup files. Then--"

"Just do it," Bishop said and lifted the sheets of paper out of the printer - what they'd managed to steal from Phate's computer via the screen dump before he encrypted the data. To the rest of the team he said, "Let's see if we've got anything."

Gillette's eyes and mouth burned from the fumes of the smoldering computer. He noticed that Bishop, Shelton and Sanchez had paused and were staring at the smoking machine uneasily, undoubtedly thinking the same thing he was: How unnerving it was that something as insubstantial as software code - mere strings of digital ones and zeros - could so easily caress your physical body with a hurtful, even lethal, touch.

Under the gaze of his faux family, watching him from the pictures in the living room, Phate paced throughout the room, nearly breathless with anger.

Valleyman had gotten inside his machine...

And, worse, he'd done this with a simple-minded backdoor program, the kind that a high school geek could hack together.

He'd immediately changed his machine's ident.i.ty and his Internet address, of course. There was no way Gillette could break in again. But what troubled Phate now was this: What had the police seen? Nothing in this machine would lead them to his house in Los Altos but it had a lot of information about his present and future attacks. Had Valleyman seen the Next Projects folder? Had he seen what Phate was about to do in a few hours?

All the plans were made for the next a.s.sault... h.e.l.l, it was already under way.

Should he pick a new victim?

But the thought of giving up on a plan that he'd spent so much effort and time on was hard for him. More galling than the wasted effort, however, was the thought that if he abandoned his plans it would be because of a man who'd betrayed him - the man who'd turned him in to the Ma.s.sachusetts police, exposed the Great Social Engineering and, in effect, murdered Jon Patrick Holloway, forcing Phate underground forever.

He sat at the computer screen once more, rested his callused fingers on plastic keys smooth as a woman's polished nails. He closed his eyes and, like any hacker trying to figure out how to debug some flawed script, he let his mind wander where it wished.

Jennie Bishop was wearing one of those terrible, open-up-the-back robes they give you in hospitals.

And what exactly, she thought, is the point of those tiny blue dots on the cloth?

She propped up the pillow and looked absently around the yellow room as she waited for Dr. Williston. It was eleven-fifteen and the doctor was late.

She was thinking about what she had to do after the tests here were completed. Shopping, picking up Brandon after school, shepherding him to the tennis courts. Today the boy would be playing against Linda Garland, who was the cutest little thing in fourth grade - and a total brat whose only strategy was to rush the net every chance she got, in an attempt, Jennie was convinced, to break her opponents' noses with a killer volley.

Thinking about Frank too, of course. And deciding how vastly relieved she was that her husband wasn't here. He was such a contradiction. Chasing bad men through the streets of Oakland. Unfazed as he arrested killers twice his size and chatted happily with prost.i.tutes and drug dealers. She didn't think she'd ever seen him shaken up.

Until last week. When a medical checkup had shown that Jennie's white blood cell count was out of whack for no logical reason. As she told him the news Frank Bishop went sheet white and had fallen silent. He'd nodded a dozen times, his head rising and falling broadly. She'd thought he was going to cry - something she'd never seen - and Jennie wondered how exactly she'd have handled that.

"So what does it all mean?" Frank had asked in a shaky voice.

"Might be some kind of weird infection," she told him, looking him right in the eye, "or it might be cancer."

"Okay, okay," he'd repeated in a whisper, as if speaking more loudly or saying anything else would pitch her into imminent peril.

They'd talked about some meaningless details - appointment times, Dr. Williston's credentials - and then she'd booted him outside to tend his orchard while she got supper ready.

Might be some kind of weird infection...

Oh, she loved Frank Bishop more than she'd ever loved anyone, more than she ever could love anyone. But Jennie was very grateful that her husband wasn't here. She wasn't in any mood to hold somebody else's hand at the moment.

Might be cancer...

Well, she'd know soon enough what it was. She looked at the clock. Where was Dr. Williston? She didn't mind hospitals, didn't mind having unpleasant tests, but she hated waiting. Maybe there was something on TV. When did The Young and the Restless come on? Or she could listen to the radio, maybea"

A squat nurse wheeling a medical cart pushed into the room. "Morning," the woman said in a thick Latino accent.

"h.e.l.lo."

"You Jennifer Bishop?"

"That's right."

The nurse hooked Jennie up to a vital functions monitor mounted to the wall above the bed. A soft beep began to sound rhythmically. Then the woman consulted a computer printout and looked over a wide array of medicines.

"You Dr. Williston's patient, right?"

"That's right."

She looked at Jennie's plastic wrist bracelet and nodded.

Jennie smiled. "Didn't believe me?"

The nurse said, "Always double-check. My father, he was carpenter, you know. He always say, 'Measure twice, cut once.'"

Jennie struggled to keep from laughing, thinking that this probably wasn't the best expression to share with patients in a hospital.

She watched the nurse draw some clear liquid into the hypodermic and asked, "Dr. Williston ordered an injection?"

"That's right."

"I'm only in for some tests."

Checking the printout again, the woman nodded. "This is what he ordered."

Jennie looked at the sheet of paper but it was impossible to make sense out of the words and numbers on it.

The nurse cleaned her arm with an alcohol wipe and injected the drug. After she withdrew the needle Jennie felt an odd tingle spread through her arm near the site of the injection - a burning coldness.

"The doctor be with you soon."

She left before Jennie could ask her what the injection was. It troubled her a little, the shot. She knew you had to be careful with medicines in her condition but then she told herself there wasn't anything to worry about. The fact that she was pregnant was clearly shown in the records, Jennie knew, and surely no one here would do anything to jeopardize the baby.

CHAPTER 0010000 / THIRTY-TWO.

All I need is the numbers of the cell phone he's using and, oh, about one square mile to call my own. And I can walk right up this fellow's backside."

This rea.s.surance came from Garvy Hobbes, a blond man of indeterminate age, lean except for a seriously round belly that suggested an affection for beer. He was wearing blue jeans and a plaid shirt.

Hobbes was the head of security for the main cellular phone service provider in Northern California, Mobile America.

Shawn's e-mail on cellular phone service, which Gillette had found in Phate's computer, was a survey of companies that provided the best service for people wishing to use their mobile phones to go online. The survey listed Mobile America as number one and the team a.s.sumed that Phate would follow Shawn's recommendation. Tony Mott had called Hobbes, with whom the Computer Crimes Unit had often worked in the past.

Hobbes confirmed that many hackers used Mobile America because to go online with a cellular phone you needed a consistently high-quality signal, which Mobile America provided. Hobbes nodded toward Stephen Miller, who was hard at work with Linda Sanchez getting the CCU computers hooked up and online again. "Steve and I were just talking about that last week. He thought we should change our company's name to Hacker's America."

Bishop asked how they could track down Phate now that they knew he was a customer, though probably an illegal one.

"All you need is the ESN and the MIN of the phone he's using," Hobbes said.

Gillette - who'd done his share of phone phreaking -knew what these initials meant and he explained: Every cell phone had both an ESN (the electronic serial number, which was secret) and an MIN (the mobile identification number - the area code and seven-digit number of the phone itself).

Hobbes went on to explain that if he knew these numbers, and if he was within a mile or so of the phone when it was being used, he could use radio direction finding equipment to track down the caller to within a few feet. Or, as Hobbes repeated, "Right up his backside."

"How do we find out what the numbers of his phone are?" Bishop asked.

"Ah, that's the hard part. Mostly we know the numbers 'cause a customer reports his phone's been stolen. But this fellow doesn't sound like the sort to pickpocket one. However you find out, though, we need those numbers -otherwise we can't do a thing for you."

"How fast can you move if we do get them?"

"Me? Lickety-split. Even faster if I get to ride in one of those cars with the flashing lights on top of it," he joked. He handed them a business card. Hobbes had two office numbers, a fax number, a pager and two cell phone numbers. He grinned. "My girlfriend likes it that I'm highly accessible. I tell her it's 'cause I love her but, fact is, with all the call jacking going on, the company wants me available. Believe you me, stolen cellular service is gonna be the big crime of the new century."

"Or one of them," Linda Sanchez muttered, her eyes on the desktop photo of Andy Anderson and his family.

Hobbes left and the team went back to looking over the few doc.u.ments they'd had a chance to print out from Phate's computer before he encrypted the data.

Miller announced that CCU's improvised network was up and running. Gillette checked it out and supervised the installation of the most current backup tapes - he wanted to make sure there was still no link to ISLEnet from this machine. He'd just finished running the final diagnostic check when the machine started to beep.

Gillette looked at the screen, wondering if his hot had found something else. But, no, the sound was announcing an incoming e-mail. It was from Triple-X.

Reading the message out loud, Gillette said, "'Here's a phile with some good stuff on our phriend.'" He looked up. "File, p-h-i-1-e. Friend, p-h-r-i-e-n-d."

"It's all in the spelling," Bishop mused. Then said, "I thought Triple-X was paranoid - and was only going to use the phone." '

"He didn't mention Phate's name and the file itself's encrypted." Gillette noticed the Department of Defense agent stir and he added, "Sorry to disappoint you, Agent Backle - it's not Standard 12. It's a commercial public key encryption program." Then he frowned. "But he never sent us the key to open it. Did anybody get a message from Triple-X?"

No one had taken any calls from the hacker.

"Do you have his number?" Gillette asked Bishop.

The detective said no, that when Triple-X had called earlier with Phate's e-mail address the caller ID on Bishop's phone indicated the hacker was calling from a pay phone.

But Gillette examined the encryption program. He laughed and said, "I'll bet I can crack it without the key." He slipped the disk containing his hacker tools into one of the PCs and loaded a decryption cracker he'd hacked together a few years ago.

Linda Sanchez, Tony Mott and Shelton had been looking over the few pages of material that Gillette had managed to screen dump out of Phate's Next Projects folder before the killer stopped the download and encrypted the data.

Mott taped the sheets up on the white-board and the team stood in a cl.u.s.ter in front of them.

Bishop noted, "There're a lot of references to facilities management - janitorial, parking, security and food services, personnel, payroll. It sounds like the target is a big place."

Mott said, "The last page, look. Medical services."

"A hospital," Bishop said. "He's going after a hospital."

Shelton added, "Makes sense - high security, lots of victims to choose from.

Nolan nodded. "It fits his profile for challenges and game playing. And he could pretend to be anybody - a surgeon or nurse or janitor. Any clue which one he's thinking of?"

But no one could find any reference to a specific hospital on the pages.

Bishop pointed to a block of type on one of the printouts.

CSGEI Claims ID Numbers - Unit 44 "Something about that looks familiar."

Below the words was a long list of what seemed to be social security numbers.