SECTION I

PILLAR OF AUTUMN

CHAPTER ONE

0127 Hours (Ship’s Time), September 19, 2552 (Military Calendar) /

UNSC Cruiser Pillar of Autumn , location unknown.

The Pillar of Autumn shuddered as her Titanium-A armor took a direct hit.

Just another item in the Covenant’s bottomless arsenal, Captain Jacob Keyes thought. Not a plasma torpedo, or we’d already be free-floating molecules.

The warship had taken a beating from Covenant forces off Reach and it was a miracle that the hull remained intact and even more remarkable that they’d been able to make a jump into Slipspace at all.

“Status!” Keyes barked. “What just hit us?”

“Covenant fighter, sir. Seraph-class,” the tactical officer, Lieutenant Hikowa, replied. Her porcelain features darkened. “Tricky bastard must have powered down and slipped past our sentry ships.”

A humorless grin tugged at Keyes’ mouth. Hikowa was a first-rate tactical officer, utterly ruthless in a fight. She seemed to take the Covenant fighter pilot’s actions as a personal insult. “Teach him a lesson, Lieutenant,” he said.

She nodded and tapped a series of orders into her panel—new orders for the Autumn ’s fighter squadron.

A moment later, there was radio chatter as one of the Autumn ’s C709 Longsword fighters went after the Seraph, followed by a cheer as the tiny alien ship transformed into a momentary sun, complete with its own system of co-orbiting debris.

Keyes wiped a trickle of sweat from his forehead. He checked his display— they’d reverted back into real space twenty minutes ago. Twenty minutes , and the Covenant picket patrols had already found them and started shooting.

He turned to the bridge’s main viewport, a large transparent bubble slung beneath the Autumn ’s bow superstructure. A massive purple gas giant— Threshold—dominated the spectacular view. One of the Longsword fighters glided past as it continued its patrol.

When Keyes had been given command of the Pillar of Autumn , he’d been skeptical of the large, domed viewport. “The Covenant are tough enough,”

he had argued to Admiral Stanforth. “Why give them an easy shot into my bridge?”

He’d lost the argument—captains don’t win debates with admirals, and in any case there simply hadn’t been time to armor the viewport. He had to admit, though, the view was almost worth the risk. Almost.

He absently toyed with the pipe he habitually carried, lost in thought. It ran completely counter to his nature to slink around in the shadow of a gas giant.

He respected the Covenant as a dangerous, deadly enemy, and hated them for their savage butchery of human colonists and fellow soldiers alike. He had never feared them, however. Soldiers didn’t hide from the enemy—they met the enemy head-on.

He moved back to the command station and activated his navigation suite.

He plotted a course deeper in-system, and fed the data to Ensign Lovell, the navigator.

“Captain,” Hikowa piped up. “Sensors paint a squadron of enemy fighters inbound. Looks like boarding craft are right behind them.”

“It was just a matter of time, Lieutenant.” He sighed. “We can’t hide here forever.”

The Pillar seemed to glide out of the shadow cast by the gas giant, and into bright sunlight.

Keyes’ eyes widened with surprise as the ship cleared the gas giant. He had expected to see a Covenant cruiser, Seraph fighters, or some other military threat.

He hadn’t expected to see the massive object floating in a Lagrange point between Threshold and its moon, Basis.

The construct was enormous—a ring-shaped object that shimmered and glowed with reflected starlight, like a jewel lit from within.

The outer surface was metallic and seemed to be engraved with deep geometric patterns. “Cortana,” Captain Keyes said. “What is that?”

A foot-high hologram faded into view above a small holopad near the captain’s station. Cortana—the ship’s powerful artificial intelligence— frowned as she activated the ship’s long-range detection gear. Long lines of digits scrolled across the sensor displays and rippled the length of Cortana’s “body” as well.

“The ring is ten thousand kilometers in diameter,” Cortana announced, “and twenty-two point three kilometers thick. Spectroscopic analysis is inconclusive, but patterns do not match any known Covenant materials, sir.”

Keyes nodded. The preliminary finding was interesting, very interesting, since Covenant ships had already been present when the Autumn dropped out of Slipspace and right into their laps. When he first saw the ring, Keyes had a sinking feeling that the construct was a large Covenant installation—one far beyond the scope of human engineering. The thought that the construct might also be beyond Covenant engineering held some small comfort.

It also made him nervous.

Under intense pressure from enemy warships in the Epsilon Eridani system—the location of the UNSC’s last major naval base, Reach—Cortana had been forced to launch the ship toward a random set of coordinates, a standard procedure to lead the Covenant forces away from Earth.

Now it appeared that the men and women aboard the Pillar of Autumn had succeeded in leaving their original pursuers behind, only to encounter even more Covenant forces here . . . wherever “here” was.

Cortana aimed a long-range camera array at the ring and a close-up snapped into focus. Keyes let out a long, slow whistle. The construct’s inner surface was a mosaic of greens, blues, and browns—trackless desert, jungles, glaciers, and oceans. Streaks of white clouds cast deep shadows on the terrain below. The ring rotated and brought a new feature into view: a tremendous hurricane forming over a large body of water.

Equations again scrolled across the AI’s semitransparent body as she continued to evaluate the incoming data. “Captain,” Cortana said, “the object is clearly artificial. There’s a gravity field that controls the ring’s spin and keeps the atmosphere inside. I can’t say with one hundred percent certainty, but it appears that the ring has an oxygen-nitrogen atmosphere, and Earth- normal gravity.”

Keyes raised an eyebrow. “If it’s artificial, who the hell built it, and what in God’s name is it?”

Cortana processed the question for a full three seconds. “I don’t know, sir.”

Regulations be damned, Keyes thought. He took out his pipe, used an old- fashioned match to light it, and produced a puff of fragrant smoke. The ring world shimmered on the status monitors. “Then we’d better find out.”

Sam Marcus rubbed his aching neck with hands that trembled with fatigue.

The rush of adrenaline that had flooded him when he’d received Tech Chief Shephard’s instructions had worn off. Now he just felt tired, strung out, and more than a little afraid.

He shook his head to clear it and surveyed the small observation theater.

Each cryostorage bay was equipped with such a station, a central monitoring facility for the hundreds of cryotubes the storage bays held. By shipboard standards, the Cryo Two Observation Theater was large, but the proliferation of life-sign monitors, diagnostic gauges, and computer terminals—tied directly into the individual cryotubes stored in the bay below—made the room seem cramped and uncomfortable.

A chime sounded and Sam’s eyes swept across the status monitors. There was only one active cryotube in this bay, and its monitor pinged for his attention. He double-checked the main instrument panel, then keyed the intercom. “He’s coming around, sir,” he said. He turned and looked out the observation bay’s window.

Tech Chief Thom Shephard waved up at Sam from the floor of Cryostorage Unit Two. “Good work, Sam,” he called back. “Almost time to pop the seal.”

The status monitors continued to feed information to the observation theater.

The subject’s body temperature was approaching normal—at least, Sam assumed it was normal; he’d never awakened a Spartan before—and most of the chemicals had already been flushed out of his system.

“He’s in a REM cycle now, Chief,” Sam called out, “and his brainwave activity shows he’s dreaming—that means he’s pretty much thawed.

Shouldn’t be long now.”

“Good,” Shephard replied. “Keep an eye on those neuro readings. We packed him in wearing his combat armor. There may be some feedback effects to watch out for.”

“Acknowledged.”

A red light winked to life on the security terminal, and a new series of codes flashed across the screen:

WAKE-UP SERIES STANDBY. SECURITY LOCK [PRIORITY

ALPHA] ENGAGED.

x-CORTANA.1.0—CRYOSTOR.23.4.7

“What the hell?” Sam muttered. He keyed the bay intercom again. “Thom? There’s something weird here . . . some kind of security lockout from the bridge.”

“Acknowledged.” There was a static-spotted click as Shephard looped in the bridge channel. “Cryo Two to Bridge.”

“Go ahead, Cryo Two,” a female voice replied, laced with the telltale warble of synthesized speech.

“We’re ready to pop the seal on our . . . guest, Cortana,” Shephard explained. “We need—”

“—the security code,” the AI finished. “Transmitting. Bridge out.”

Almost instantly, a new line of text scrolled across the security screen:

UNSEAL THE HUSHED CASKET.

Sam hit the execute command, the security lockout dropped away, and a countdown timer began marking time until the wake-up sequence would be completed.

The soldier was coming around. Respiration was up, ditto his heart rate, as both returned to normal levels. Here he is, Sam thought, a real honest-to-god Spartan. Not just any Spartan, but maybe the last Spartan. The shipboard scuttlebutt said that the rest of them had bought the farm at Reach.

Like his fellow techs, Sam had heard of the program, though he’d never seen an actual Spartan in person. In order to deal with increasing civil turmoil the Colonial Military Administration had secretly launched Project ORION back in 2491. The purpose of the program was to develop supersoldiers, code- named “Spartans,” who would receive special training and physical augmentation.

The initial effort was successful, and in 2517 a new group of Spartans, the II-series, had been selected as the next generation of supersoldier. The project had been intended to remain secret, but the Covenant War had changed all that.

It was no secret that the human race was on the verge of defeat. The Covenant’s ships and space technology were just too advanced. While human forces could hold their own in a ground engagement, the Covenant would simply fall back into space and glass the planet from orbit.

As the situation grew increasingly grim, the Admiralty was faced with the ugly prospect of fighting a two-front war—one against the Covenant in space, and another against the collapsing human society on the ground. The general public and the rank-and-file in the military needed a morale boost, so the existence of the SPARTAN-II project was revealed.

There were now successful heroes to rally behind, men and women who had taken the fight to the enemy and won several decisive battles. Even the Covenant seemed to fear the Spartans.

Except they were gone now, all but one, sacrificed to protect the human race from the Covenant and the very real possibility of extinction. Sam gazed on the soldier in front of him with something akin to awe. Here, about to rise as if from a grave, was a true hero. It was a moment to remember, and if he was lucky enough to survive, to tell his children about.

It didn’t make him any less afraid, however. If the stories were true, the man gradually regaining consciousness in the bay below was almost as alien, and certainly as dangerous, as the Covenant.

He was floating in the never-never land somewhere between cryo and full consciousness when the dream began.

It was a familiar dream, a pleasant dream, and one which had nothing to do with war. He was on Eridanus II—the colony world he’d been born on, long since destroyed by the Covenant. He heard laughter all around.

A female voice called him by name—John. A moment later, arms held him, and he recognized the familiar scent of soap. The woman said something nice to him, and he wanted to say something nice in return, but the words wouldn’t come. He tried to see her, tried to penetrate the haze that obscured her face, and was rewarded with the image of a woman with large eyes, a straight nose, and full lips.

The picture wavered, indistinct, like a reflection in a pond. In an eyeblink, the woman who held him transformed. Now she had dark hair, piercing blue eyes, and pale skin.

He knew her name: Dr. Halsey.

Dr. Catherine Halsey had selected him for the SPARTAN-II project. While most believed that the current generation of Spartans had been culled from the best of the UNSC military, only a handful of people knew the truth.

Halsey’s program involved the actual abduction of specially-screened children. The children were flash-cloned—which made the duplicates prone to neurological disorders—and the clones covertly returned to the parents, who never suspected that their sons and daughters were duplicates. In many ways, Dr. Halsey was the only “mother” that he had ever known.

But Dr. Halsey wasn’t his mother, nor was the pale semitranslucent image of Cortana that appeared to replace her.

The dream changed. A dark, nebulous shape loomed behind the Mother/Halsey/Cortana figure. He didn’t know what it was, but it was a threat—of that he was certain.

His combat instincts kicked in, and adrenaline coursed through him. He quickly surveyed the area—some kind of playground, with high wooden poles, distantly familiar—and decided on the best route to flank the new threat. He spied an assault rifle, a powerful MA5B, nearby. If he placed himself between the woman and the threat, his armor could take the brunt of an attack, and he could return fire.

He moved quickly, and the dark shape howled at him—a fierce and terrifying war cry.

The beast was impossibly fast. It was on him in seconds.

He grabbed the assault rifle and turned to open fire—and discovered to his horror that he couldn’t lift the weapon. His arms were small, underdeveloped. His armor was gone, and his body was that of a six-year- old child.

He was powerless in the face of the threat. He roared back at the beast in rage and fear—angry not just at the threat, but at his own sudden powerlessness . . .

The dream started to fade, and light appeared in front of the Spartan’s eyes.

Vapor vented, swirled, and began to dissipate. A voice came, as if from a great distance. It was male and matter-of-fact.

“Sorry for the quick thaw, Master Chief—but things are a bit hectic right now. The disorientation should pass quickly.”

A second voice welcomed him back and it took the Spartan a moment to remember where he’d been prior to entering the cryotube. There had been a battle, a terrible battle, in which most if not all of his Spartan brothers and sisters had been killed. Men and women with whom he had been raised and trained since the age of six, and who, unlike the dimly remembered woman of his dreams, constituted his real family.

With the memory, plus subtle changes to the gas mix that filled his lungs, came strength. He flexed his stiff limbs. The Spartan heard the tech say something about “freezer burn,” and pushed himself up and out of the cryotube’s chilly embrace.

“God in heaven,” Sam whispered.

The Spartan was huge, easily seven feet tall. Encased in pearlescent green battle armor, the man looked like a figure from mythology—otherworldly and terrifying. Master Chief SPARTAN-117 stepped from his tube and surveyed the cryo bay. The mirrored visor on his helmet made him all the more fearsome, a faceless, impassive soldier built for destruction and death.

Sam was glad that he was up here in the observation theater, rather than down on the Cryo Two main floor with the Spartan.

He realized that Thom was waiting for diagnostic data. He checked the displays—neural pathways clear, no fluctuations in heartbeat or brainwave activity. He opened an intercom channel. “I’m bringing his health monitors on-line now.”

Sam watched as Thom led the Spartan to the various test stations in the bay, pitching in where he was required. In short order, the soldier’s gear had been brought on-line—recharging shield system, real-time health monitors, targeting and optical systems all read in the green.

The suit—code-named MJOLNIR armor—was a marvel of engineering, Sam had to admit. According to the specs he’d received, the suit’s shell consisted of a multilayered alloy of remarkable strength, a refractive coating that could disperse a fair amount of directed energy, a crystalline storage matrix that could support the same level of artificial intelligence usually reserved for a starship, and a layer of gel which conformed to the wearer’s skin and functioned to regulate temperature.

Additional memory packets and signal conduits had been implanted into the Spartan’s body, and two externally accessible input slots had been installed near the base of his skull. Taken together, the combined systems served to double his strength, enhance his already lightning-fast reflexes, and make it possible for him to navigate through the intricacies of any high-tech battlefield.

There were substantial life-support systems built into the MJOLNIR gear.

Most soldiers went into cryo naked, since covered skin generally reacted badly to the cryo process. Sam had once worn a bandage into the freezer and discovered the affected skin blistered and raw when he woke up.

The Spartan’s skin must have hurt like hell, he realized. Through it all, though, the soldier remained silent, simply nodding when asked questions or quietly complying with requests from Thom. It was eerie—he moved with mechanistic efficiency from one test to the next, like a robot.

Cortana’s voice rang from the shipwide com: “Sensors show inbound Covenant boarding craft. Stand by to repel boarders.”

Sam felt a pang of fear—and sorrow for the Covenant troops that would have to face this Spartan in combat.

The neural interface which linked the Master Chief to his MJOLNIR armor was working perfectly, and immediately fed data to his helmet’s heads-up- display on the inside surface of his visor.

It felt good to move around, and the Master Chief quietly flexed his fingers.

His skin itched and stung, a side effect of the cryo gases, but he quickly banished the pain from his awareness. He had long ago learned how to disassociate himself from physical discomfort.

He’d heard Cortana’s announcement. The Covenant were on their way.

Good. He scanned the room for weapons, but there was no arms locker present. The lack of weapons wasn’t of great concern to him; he’d taken weapons away from Covenant soldiers before.

The intercom crackled again: “Bridge to Cryo Two—this is Captain Keyes.

Send the Master Chief to the bridge immediately.”

One of the techs started to object, pointing out that more tests were required, when Keyes cut in. He said, “On the double, crewman,” and the rating gave the only reply he could.

“Aye, aye, sir.”

The tech chief turned and faced him. “We’ll find weapons later.”

The Master Chief nodded and was about to move for the door when an explosion echoed through the cryo bay.

The first blasts slammed into the observation theater’s door with a noise that made Sam jump. His heart pounded as he quickly hit the door controls, engaging an emergency lockout. A heavy metal barrier slammed into place with a crash—then began to glow red as Covenant energy weapons burned their way through.

“They’re trying to get through the door!” he yelled.

He glanced down into the bay and saw Thom, a stricken look on his face.

Sam could see his own startled reflection in the Spartan’s mirrored visor.

Sam lunged for the alarm, and had time to call in an alert. Then, the security door exploded in a shower of fire and molten steel.

He heard the whine of plasma rifle fire, then felt something punch him in the chest. His vision blurred, and he groped to feel the wound. His hands came away sticky with blood. It doesn’t hurt, he thought. It should hurt, shouldn’t it?

He felt disoriented, confused. He could see a flurry of movement, as armored figures swarmed into the observation theater. He ignored them and focused on his wife’s picture—smeared with his own blood—which had somehow fallen to the deckplates. He fell to his knees and scrambled for the photograph, his hands shaking.

His field of vision narrowed as he struggled to reach the discarded photo. It was only inches away now, but the distance felt like miles. He’d never been so tired. His wife’s name echoed in his mind.

Sam’s fingers had just brushed the edge of the photograph when an armored boot pinned his arm to the deck. Long, clawed fingers plucked the picture from the floor.

Sam cursed weakly and struggled to face his attacker. The alien—an Elite— cocked his head at the image in puzzlement. He glanced down, as if noticing Sam for the first time. The human continued to reach for the picture.

He dimly heard Thom’s voice call out in anguish: “Sam!”

The Elite aimed the plasma rifle at Sam’s head and fired.

The Master Chief bristled. Covenant forces were in close proximity, and a fellow soldier had just died. He longed to climb to the observation bay and engage the enemy—but orders were orders. He needed to get to the bridge.

The cryo tech keyed open a hatchway. “Come on!” he yelled, “we’ve got to get the hell out of here!”

The Master Chief followed the crewman through the hatch and down the corridor. A sudden explosion blew the next door to smithereens, hurled what remained of the technician’s body down the passageway, and caused the Chief’s shields to flare.

He mentally reviewed the schematics of the Halcyon-class line of ships and doubled back. He vaulted over a pair of power conduits, and landed in the dimly lit maintenance hallway beyond. An emergency beacon strobed and alarms wailed. The rumble of a second explosion echoed down the corridor.

He pushed ahead, past a dead crewman, and into the next section of hallway.

The Master Chief saw a hatch, its security panel pulsing green, and hurried forward. There was a third explosion, but his armor deflected the force of the blast.

The Spartan forced open the partially melted door, saw an opening to his left, and heard someone scream. A naval crewman fired his sidearm at a target the Master Chief couldn’t see—and the deck shuddered as a missile struck the Autumn ’s hull.

The Master Chief ducked under a half-raised door just in time to see the crewman take an energy bolt through the chest as the rest of the human counterboarders returned fire. Covenant forces backed through a hatch and were forced to retreat into an adjoining compartment.

Chaos reigned as the ship’s crew did the best they could to push the boarders back toward the air locks or to trap them in compartments where they could be contained and dispatched later.

Unarmed, and well aware of the fact that Captain Keyes needed him on the bridge, the Master Chief had little choice but to follow the signs, and avoid the firefights that raged all around. He made his way down a darkened access corridor—the Covenant boarders must have shorted out the illumination circuits in this compartment—and nearly ran headlong into a Covenant Elite.

The alien’s personal shields sparked and he roared in surprise and anger. The Spartan crouched and prepared to meet the alien soldier’s charge—then ducked, as a Marine fire-team unleashed a barrage of assault-rifle fire at the Elite. Purple gore splashed the bulkhead, and the alien dropped in a crumpled heap.

The Marines moved forward to secure the area, and the Chief nodded in thanks to the squad leader. He turned, sprinted down the passageway, and made it to the bridge without further incident.

He looked out through the main viewport, saw the strange-looking construct that floated out beyond the cruiser’s hull, and was momentarily curious about what it was. No doubt the Captain would fill him in. He strode toward the captain’s station, near the center of the bridge.

A variety of naval personnel sat hunched at their consoles as they struggled to control their beleaguered vessel. Some battled the latest wave of Seraph fighters, others worked on damage control, and one grim-faced Lieutenant made use of the ship’s environmental systems to suck the atmosphere out of those compartments which had been occupied by Covenant forces. Some of the enemy carried their own atmosphere, but some of them didn’t, and that made them vulnerable. There were crew in some of those spaces, perhaps some she knew personally, but there was no way to save them. If she didn’t kill them, then the enemy would.

The Chief understood the situation well. Better a quick death in vacuum than at the hands of the Covenant.

He spotted Keyes near the main tactical display. Keyes studied the screens intently, particularly a large display of the strange ring.

The Spartan came to attention. “Captain Keyes.”

Captain Keyes turned to face him. “Good to see you, Master Chief. Things aren’t going well. Cortana did her best—but we never really had a chance.”

The AI arched a holographic eyebrow. “A dozen Covenant battleships against a single Halcyon-class cruiser . . . With those odds we still had three—” She paused, as if distracted, then amended: “—make that four kills.”

Cortana looked at the Chief. “Sleep well?”

“Yes,” he replied. “No thanks to your driving.”

Cortana smiled. “So, you did miss me.”

Before he could reply, another blast rocked the entire ship. He grabbed a nearby support pillar and braced himself, as several crewers crashed to the deck nearby.

Keyes grabbed onto a console for support. “Report!”

Cortana shimmered blue. “It must have been one of their boarding parties. My guess is an antimatter charge.”

The fire control officer turned in his seat. “Ma’am! Fire control for the main cannon is off-line!”