The dog dashed ahead, along the ascending trail, which led up toward the canyon rim, through thinning trees and brighter light.

Travis paused at the sycamores. Frowning, he looked across the sun-drenched clearing at the night-dark hole in the forest where the descending portion of the trail began. What was coming?

The shrill cries of the cicadas cut off simultaneously, as if a phonograph needle was lifted from a recording. The woods were preternaturally silent.

Then Travis heard something rushing up the lightless trail. A scrabbling noise. A clatter as of dislodged stones. A faint rustle of dry brush. The thing sounded closer than it probably was, for sound was amplified as it echoed up through the narrow tunnel of trees. Nevertheless, the creature was coming fast. Very fast.

For the first time, Travis sensed that he was in grave peril. He knew that nothing in the woods was big or bold enough to attack him, but his intellect was overruled by instinct. His heart hammered.

Above him, on the higher path, the retriever had become aware of his hesitation. It barked agitatedly.

Decades ago, he might have thought an enraged black bear was racing up the deer trail, driven mad by disease or pain. But the cabin dwellers and weekend hikers-outriders of civilization-had pushed the few remaining bears much farther back into the Santa Anas.

From the sound of it, the unknown beast was within seconds of reaching the clearing between the lower and higher trails.

The length of Travis's spine, shivers tracked like melting bits of sleet trickling down a windowpane.

He wanted to see what the thing was, but at the same time he had gone cold with dread, a purely instinctive fear.

Farther up the canyon, the golden retriever barked urgently.

Travis turned and ran.

He was in excellent shape, not a pound overweight. With the panting retriever leading, Travis tucked his arms close to his sides and sprinted up the deer trail, ducking under the few low-hanging branches. The studded soles of his hiking boots gave good traction; he slipped on loose stones and on slithery layers of dry pine needles, but he did not fall. As he ran through a false fire of flickering sunlight and shadow, another fire began to burn in his lungs.

Travis Cornell's life had been full of danger and tragedy, but he'd never flinched from anything. In the worst of times, he calmly confronted loss, pain, and fear. But now something peculiar happened. He lost control. For the first time in his life, he panicked. Fear pried into him, touching a deep and primitive level where nothing had ever reached him before. As he ran, he broke out in gooseflesh and cold sweat, and he did not know why the unknown pursuer should fill him with such absolute terror.

He did not look back. Initially, he did not want to turn his eyes away from the twisting trail because he was afraid he would crash into a low branch. But as he ran, his panic swelled, and by the time he had gone a couple of hundred yards, the reason he did not look back was because he was afraid of what he might see.

He knew that his response was irrational. The prickly sensation along the back of his neck and the iciness in his gut were symptoms of a purely superstitious terror. But the civilized and educated Travis Cornell had turned over the reins to the frightened child-savage that lives in every human being-the genetic ghost of what we once were-and he could not easily regain control even though he was aware of the absurdity of his behavior. Brute instinct ruled, and instinct told him that he must run, run, stop thinking and just run.

Near the head of the canyon, the trail turned left and carved a winding course up the steep north wall toward the ridge. Travis rounded a bend, saw a log lying across the path, jumped but caught one foot on the rotting wood. He fell forward, flat on his chest. Stunned, he could not get his breath, could not move.

He expected something to pounce on him and tear out his throat.

The retriever dashed back down the trail and leaped over Travis, landing sure-footedly on the path behind him. It barked fiercely at whatever was chasing them, much more threateningly than when it had challenged Travis in the clearing.

Travis rolled over and sat up, gasping. He saw nothing on the trail below. Then he realized the retriever was not concerned about anything in that direction but was standing sideways on the trail, facing the underbrush in the forest to the east of them. Spraying saliva, it barked stridently, so hard and loud that each explosive sound hurt Travis's ears. The tone of savage fury in its voice was daunting. The dog was warning the unseen enemy to stay back.

“Easy boy,” Travis said softly. “Easy.”

The retriever stopped barking but did not glance at Travis. It stared intently into the brush, peeling its pebbly black lips off its teeth and growling deep in its throat.

Still breathing hard, Travis got to his feet and looked east into the woods. Evergreens, sycamores, a few larches. Shadows like swatches of dark cloth were fastened here and there by golden pins and needles of light. Brush. Briars. Climbing vines. A few well-worn toothlike formations of rock. He saw nothing out of the ordinary.

When he reached down and put a hand upon the retriever's head, the dog stopped growling, as if it understood his intention. Travis drew a breath, held it, and listened for movement in the brush.

The cicadas remained silent. No birds sang in the trees. The woods were as still as if the vast, elaborate clockwork mechanism of the universe had ceased ticking.

He was sure that he was not the cause of the abrupt silence. His passage through the canyon had not previously disturbed either birds or cicadas.

Something was out there. An intruder of which the ordinary forest creatures clearly did not approve.

He took a deep breath and held it again, straining to hear the slightest movement in the woods. This time he detected the rustle of brush, a snapping twig, the soft crunch of dry leaves-and the unnervingly peculiar, heavy, ragged breathing of something big. It sounded about forty feet away, but he could not pinpoint its location.

At his side, the retriever had gone rigid. Its floppy ears were slightly pricked, straining forward.

The unknown adversary's raspy breathing was so creepy-whether because of the echo effect of the forest and canyon, or because it was just creepy to begin with-that Travis quickly took off his backpack, unsnapped the flap, and withdrew the loaded .38.

The dog stared at the gun. Travis had the weird feeling that the animal knew what the revolver was-and approved of the weapon.

Wondering if the thing in the woods was a man, Travis called out: “Who's there? Come on out where I can see you.”

The hoarse breathing in the brush was now underlaid with a thick menacing gnarl. The eerie guttural resonance electrified Travis. His heart beat even harder, and he went as rigid as the retriever beside him. For interminable ticking seconds, he could not understand why the noise itself had sent such a powerful current of fear through him. Then he realized that what frightened him was the noise's ambiguity: the beast's growl was definitely that of an animal . . . yet there was also an indescribable quality that bespoke intelligence, a tone and modulation almost like the sound that an enraged man might make. The more he listened, the more Travis decided it was neither strictly an animal nor human sound. But if neither . . . then what the hell was it?

He saw the high brush stirring. Straight ahead. Something was coming toward him.

“Stop,” he said sharply. “No closer.”

It kept coming.

Now just thirty feet away.

Moving slower than it had been. A bit wary perhaps. But closing in nevertheless.

The golden retriever began to growl threateningly, again warning off the creature that stalked them. But tremors were visible in its flanks, and its head shook. Though it was challenging the thing in the brush, it was profoundly frightened of a confrontation.

The dog's fear unnerved Travis. Retrievers were renowned for boldness and courage. They were bred to be the companions of hunters, and were frequently used in dangerous rescue operations. What peril or foe could provoke such dread in a strong, proud dog like this?

The thing in the brush continued toward them, hardly more than twenty feet away now.

Though he had as yet seen nothing extraordinary, he was filled with superstitious terror, a perception of indefinable but uncanny presences. He kept telling himself he had chanced upon a cougar, just a cougar, that was probably more frightened than he was. But the icy prickling that began at the base of his spine and extended up across his scalp now intensified. His hand was so slick with sweat that he was afraid the gun would slip out of his grasp.

Fifteen feet.

Travis pointed the .38 in the air and squeezed off a single warning shot. The blast crashed through the forest and echoed down the long canyon.

The retriever did not even flinch, but the thing in the brush immediately turned away from them and ran north, upslope, toward the canyon rim. Travis could not see it, but he could clearly mark its swift progress by the waist-high weeds and bushes that shook and parted under its assault.

For a second or two, he was relieved because he thought he had frightened it off. Then he saw it was not actually running away. It was heading north-northwest on a curve that would bring it to the deer trail above them. Travis sensed that the creature was trying to cut them off and force them to go out of the canyon by the lower route, where it would have more and better opportunities to attack. He did not understand how he knew such a thing, just that he did know it.

His primordial survival instinct drove him into action without the need to think about each move he made; he automatically did what was required. He had not felt that animal surety since he had seen military action almost a decade ago.

Trying to keep his eye on the telltale tremble of the brush to his right, abandoning his backpack and keeping only the gun, Travis raced up the steep trail, and the retriever ran behind him. Fast as he was, however, he was not fast enough to overtake the unknown enemy. When he realized that it was going to reach the path well above him, he fired another warning shot, which did not startle or deflect the adversary this time. He fired twice into the brush itself, toward the indications of movement, not caring if it was a man out

there, and that worked. He did not believe he hit the stalker, but he scared it at last, and it turned away.

He kept running. He was eager to reach the canyon rim, where the trees were thin along the ridge top, where the brush was sparse, and where a brighter fall of sunlight did not permit concealing shadows.

When he arrived at the crest a couple of minutes later, he was badly winded. The muscles of his calves and thighs were hot with pain. His heart thumped so hard in his chest that he would not have been surprised to hear the echo of it bouncing off another ridge and coming back to him across the canyon.

This was where he had paused to eat some Oreos. The rattlesnake, which earlier had been sunning on a large flat rock, was gone.

The golden retriever had followed Travis. It stood beside him, panting, peering down the slope they had just ascended.

Slightly dizzy, wanting to sit and rest but aware that he was still in danger of an unknown variety, Travis looked down the deer trail, too, and scanned what underbrush he could see. If the stalker remained in pursuit of them, it was being more circumspect, climbing the slopes without disturbing the weeds and bushes.

The retriever whined and tugged once at Travis's pants leg. It scurried across the top of the narrow ridge to a declivity by which they could make their way down into the next canyon. Clearly, the dog believed they were not out of danger and ought to keep moving.

Travis shared that conviction. His atavistic fear-and the reliance on instinct that it invoked-sent him hurrying after the dog, over the far side of the ridge, into another tree-filled canyon.

2

Vincent Nasco had been waiting in the dark garage for hours. He did not look as if he would be good at waiting. He was big-over two hundred pounds, six-three, muscular-and he always seemed to be so full of energy that he might burst at any moment. His broad face was placid, usually as expressionless as the face of a cow. But his green eyes flashed with vitality, with an edgy nervous watchfulness-and with a strange hunger that was like something you expected to see in the eyes of a wild animal, some jungle cat, but never in the eyes of a man. Like a cat, in spite of his tremendous energy, he was patient. He could crouch for hours, motionless and silent, waiting for prey.

At nine-forty Tuesday morning, much later than Nasco expected, the dead-bolt lock on the door between the garage and the house was disengaged with a single hard clack. The door opened, and Dr. Davis Weatherby flicked on the garage lights, then reached for the button that would raise the big sectional door.

“Stop right there,” Nasco said, rising and stepping from in front of the doctor's pearl-gray Cadillac.

Weatherby blinked at him, surprised. “Who the hell-”

Nasco raised a silencer-equipped Walther P-38 and shot the doctor once in the face.

Ssssnap.

Cut off in midsentence, Weatherby fell backward into the cheery yellow and white laundry room. Going down, he struck his head on the clothes dryer and knocked a wheeled metal laundry cart into the wall.

Vince Nasco was not worried about the noise because Weatherby was unmarried and lived alone. He stooped over the corpse, which had wedged the door open, and tenderly put one hand on the doctor's face.

The bullet had hit Weatberby in the forehead, less than an inch above the bridge of his nose. There was little blood because death had been instantaneous, and the slug had not been quite powerful enough to smash through the back of the man's skull. Weatherby's brown eyes were open wide. He looked startled.

With his fingers, Vince stroked Weatherby's warm cheek, the side of his neck. He closed the sightless left eye, then the right, although he knew that postmortem muscle reactions would pop them open again in a couple of minutes. With a profound gratefulness evident in his tremulous voice, Vince said, “Thank you. Thank you, Doctor.” He kissed both of the dead man's closed eyes. “Thank you.”

Shivering pleasantly, Vince plucked the car keys off the floor where the dead man had dropped them, went into the garage, and opened the Cadillac's trunk, being careful not to touch any surface on which he might leave a clear fingerprint. The trunk was empty. Good. He carried Weatherby's corpse out of the laundry room, put it in the trunk, closed and locked the lid.

Vince had been told that the doctor's body must not be discovered until tomorrow. He did not know why the timing was important, but he prided himself on doing flawless work. Therefore, he returned to the laundry room, put the metal cart where it belonged, and looked around for signs of violence. Satisfied, he closed the door on the yellow and white room, and locked it with Weatherby's keys.

He turned out the garage lights, crossed the darkened space, and let himself out the side door, where he had entered during the night by quietly loiding the flimsy lock with a credit card. Using the doctor's keys, he relocked the door and walked away from the house.