Center of Gravity

There is an unseen power in the universe—a terrible force that was dominating the galaxy tens of thousands of years before the warlike Sh'daar were even aware of the existence of Sol and its planets.

As humankind approaches the Singularity,when transcendence will be achieved throughtechnology, contact will be made.

In the wake of the near destruction of the solar system, the political powers on Earth seek a separate peace withan inscrutable alien life form that no one has ever seen.But Admiral Alexander Koenig, the hero of Alphekka,has gone rogue, launching his fabled battlegroup beyond the boundaries of Human Space against all orders.With Confederation warships in hot pursuit, Koenig istaking the war for humankind’s survival directlyto a mysterious omnipotent enemy.

Planet by planet, galaxy by galaxy, the inhabited universe has fallen to the alien Xul.

Now only one obstacle stands between them and total domination: the warriors of a resilient race the world-devourers nearly annihilated centuries ago . . .

A power vast, ancient, and terrifying, the mighty Xul have lost track of the insignificant humans hundreds of years after devastating their home world-which has enabled the United Star Marines to operate unnoticed and unhindered. A near-autonomous intergalactic policing force, they battle in defense of an Earth they may not live to see again. Now, following the trail of a vanished twenty-fourth-century transport, they are journeying through an unexplored stargate to the edge of an unknown galaxy many light years from their sun. For the last, best, and only chance to defeat the tyrants of the universe may at long last be at hand . . .

War is forever

The people on Earth no longer remember how the human race was nearly obliterated centuries earlier during the terror visited upon them by the merciless Xul. But the Star Marines, thirty thousand light years from home, know all too well the horror that still lives.

In the year 2886, in the midst of the intergalactic war that has been raging nonstop for nearly a decade, the unthinkable has occurred. Intelligence has located the gargantuan hidden homeworld of humankind's dedicated foe, the brutal, unstoppable Xul. The time has come for the courageous men and women of the 1st Marine Interstellar Expeditionary Force to strike the killing blow. But misguided politics on an Earth that no longer supports their mission could prove the Marine's greatest enemy-as they plunge bravely into the maelstrom of conflict . . . and into the heart of a million-year-old mystery.

The final conflict

Chaos has erupted throughout the known galaxy, threatening countless colonies and orbital habitats—as the Associative struggles vainly to keep the peace. Extreme measures are called for in these times of dire crisis, and the Star Marines are awakened from their voluntary 850-year cybe-hibe sleep. But General Trevor Garroway and his warriors are about to discover that the old rules of engagement have drastically changed . . .

The end begins with an old-style assault on rebels at the Tarantula Stargate. But true terror looms at the edges of known reality. Humankind's eternal enemy—the brutal, unstoppable Xul—approaches, wielding a weapon monstrous beyond imagining. Suddenly not only is the future in jeopardy, but the past is as well—and if the Marines fail to eliminate their relentless xenophobic foe once and for all, the Great Annihilator will obliterate every last trace of human existence.

When called to do battle many light years from home, the 1st Marine Interstellar Expeditionary Unit rose to the challenge -- and now thousands of enslaved humans have been freed from the alien yoke. But Earth is twenty-one years older than the home planet they originally left, and the Marines need time to retrain and readjust -- time they do not have, due to the bizzare disappearance of a detachment of their brothers- and sisters-in-arms. It is a mystery, but there is a starting point: an ancient wormhole threading through the Sirius system. Whatever waits on the other side must be confronted, with stealth, with force, and without fear -- be it an ancient enemy or a devastating new threat.

The Marines are heading into the perilous unknown . . . and what transpires there could reshape the universe for millennia to come.

With the planet's fighting men and women deployed across the galaxy—battling in the noble cause of enslaved humanity—the insidious Xul have reached across space to devastate the unsuspecting Earth with asteroid fire. Without warning, a once majestic world is reduced to near-rubble—and the very future of humankind is in dire jeopardy.

Interplanetary leaders are on the brink of abandoning Earth and its colonies to an overwhelming enemy. But Brigadier General Garroway of the Marine Interstellar Expeditionary Unit is unwilling to concede defeat—not as long as there's a single marine willing to give his or her life in defense of their embattled homeworld. The ultimate battle is about to be waged—with breathtaking new attack technology, an ancient code of courage, and the help of an ally race that once inhabited the Earth—in a war that will alter the universe forever . . .

In the future,
earth's warriors have
conquered the heavens.

But on a distant world,
Humanity is in chains ...

Many millennia ago, the human race was enslaved by the An -- a fearsome alien people whose cruel empire once spanned the galaxies, until they were defeated and consigned to oblivion. But a research mission to the planet Ishtar has made a terrifying -- and fatal -- discovery: the Ahanu, ancestors of the former masters, live on, far from the reach of Earth -- born weapons and technology ... and tens of thousands of captive human souls still bow to their iron will. Now Earth's Interstellar Marine Expeditionary Unit must undertake a rescue operation as improbable as it is essential to humankind's future, embarking on a ten-year voyage to a hostile world to face an entrenched enemy driven by dreams of past glory and intent once more on domination. For those who, for countless generations, have known nothing but toil and subjugation must be granted, at all costs, the precious gift entitled to all of their star-traveling kind: freedom!

The revelations on Mars -- a half-million year-old legacy of the vanished star-traveling Builders -- have fed the flames of catastrophic war. A beleaguered United States and its Russian and Japanese allies struggle to hold their own against the indomitable forces of the enemy United Nations. The bloody conflict that has swept over the home planet now rages across the blackness of space -- with the U.S. Marine Corps in the vanguard, leading the charge as always.

But Mars is not the sole repository of alien wonders. The Earth's moon hides unsettling mysteries of its own-and dangerous secrets pointing toward an unstoppable threat advancing from somewhere beyond the solar system. And as scientists on both sides ract to utilize technology they have only barely begun to comprehend, the UN makes the opening move in a gambit that could end the hostilities quickly and decisively by bringing about the death of millions...without the aid of alien-inspired weaponry.

The Year is 2040.

The Marines have landed on Mars to guard the unearthed secrets of an ancient and dangerous alien race: Ourselves.

Scientists have discovered something astonishing in the subterranean ruins of a sprawling Martian city: startling evidence of an alternative history that threatens to split humanity into opposing factions and plunge the Earth into chaos and war. The USMC -- a branch of a military considered, until just recently, to be obsolete -- has dispatched the Marine Mars Expeditionary Force, a thirty-man weapons platoon, to the Red Planet to protect American civilians and interest with lethal force if necessary.

Because great powers are willing to devastate a world in order to keep an ancient secret buried. Because something that was hidden in the Martian dust for half a million years has just been unearthed . . . something that calls into question every belief that forms the delicate foundation of civilization . . .