Humanity is on the brink of annihilation. Only one man can turn the tide. For centuries, we explored the stars and settled new worlds. But a mysterious alien threat emerged, launching devastating attacks and seizing entire star systems. Every fifty years they come, silent and relentless, before disappearing again into the dark. And as they close in on humanity’s home worlds, one more defeat could mean total extinction.

Po Abbato turns to crime in a desperate attempt to free his younger siblings from debt slavery. He's caught, and offered a choice: Spend 25 years in a digital prison while his body rots...or join the Marines.

When the research starship Galileo vanishes without a trace, the powers-that-be are quick to bury the incident, eager to prevent escalating tensions that could lead to war. As a former POW, Soren refuses to give the ship up for lost. His daughter is one of the missing. Taking matters into his own hands, Soren starts pulling strings and calling in favors, determined to launch a clandestine mission to bring Galileo home. When an old friend offers him a ship for the operation, he expects a rusty relic headed for the scrapyard.

The day that changed Melody's life was like any other over the previous two years. She'd found she had a gift for writing, and her career as an author had almost healed the pain of losing her job. When the Secret Service rang her bell, everything changed. Something was nearing Saturn…and it was slowing down. Had she been right about the object?

Humans have reached the stars. There is no evidence any other species survived its own sentience long enough to do the same. Until now, when the Magellanix deep-space scout Accipiter discovers the Artifact, a million-year-old alien construct resting in a dormant volcano on a faraway world.

The Pandominion: a political and trading alliance of a million worlds–except that they’re really just the one world, Earth, in many different realities. And when an AI threat arises that could destroy everything the Pandominion has built, they'll eradicate it by whatever means necessary, no matter the cost to human life.

Mathematician Lakshmi Nayak receives a letter from her future self about faster-than-light travel. The equations work, and the letter itself seems to prove the possibility will someday be realized. But her paper on the topic is fiercely criticized, and she's warned away by a sinister Alliance agent. After defecting to the Union, she gets an unexpected offer: "I can build your ship." Shipbuilder John Grant learns of a secret project, which unknown to the world has been traveling to the stars for decades: Black Horizon.

How can a colony on Mars survive when the greatest danger on the planet is humanity itself? All contact is lost with the first privately funded colony on Mars during a long and destructive sandstorm. Satellite imagery of the aftermath shows extensive damage to the facility. The 54 colonists who called it home are presumed dead.

Forty thousand years ago, humanity fled a dying Earth. Traveling in massive arkships, these brave pioneers spread out across the galaxy to find a new home. After traveling thousands of light-years, one fleet of arkships arrived at Centauri, a dense cluster of stars with a vast array of potentially habitable planets. The survivors of Earth signaled to the remaining arkships that humanity had finally found its new home among the stars.

Two centuries after the Confederation staved off an invasion by the robotic Locusts, Captain Jack Romanoff faces mandatory retirement from an ever-shrinking navy. Actions speak louder than words. The Confederation doesn’t think the Locusts are coming back. But what if the politicians are wrong?

The planet of Kiln is where the tyrannical Mandate keeps its prison colony, and for inmates, the journey there is always a one-way trip. One such prisoner is Professor Arton Daghdev, xeno-ecologist and political dissident. Soon after arrival, he discovers that Kiln has a secret. Humanity is not the first intelligent life to set foot there. In the midst of a ravenous, chaotic ecosystem are the ruins of a civilization, but who were the vanished builders and where did they go?

In Lake Maracaibo, in the northwestern part of Venezuela, a long-hidden extraterrestrial artifact underneath the ocean floor triggers a disaster. The United States military launches an expedition, sending a cutting-edge team of international researchers to the source of a magnetic instability that's destroying any electronics in the region.

What would you do to change your life? How far would you go? How hard would you fight? Rather than work his bones into dust toiling away on a barren world, Ryck Lysander chooses to enlist in the Federation Marine Corps. But as he quickly finds out, this path isn't just a job...it's a calling...and not everyone is suited to wear the uniform.

During the test flight of a prototype faster-than-light craft, Lt. Commander Ky is flung into an ancient past that never existed. Rome has fallen, defeated by the mighty Carthaginian Empire, its survivors chased off the continent and onto what had been the remote province of Britannia. Hounded by the Carthaginians bent on conquering the known world, Rome is on the verge of destruction. Stranded and alone, except for a tactical AI implanted in his head, Ky has lost everything and must find a way to live in a world different than anything he's ever known.

Late in the 21st century, Earth receives what looks like an urgent plea for help from planet Proxima Centauri b in the closest star system to the Sun. Astrophysicists suspect a massive solar flare is about to destroy this heretofore-unknown civilization. Earth's space programs are unequipped to help, but an unscrupulous Russian billionaire launches a secret and highly-specialized spaceship to Proxima b, over four light-years away.

Ryland Grace is the sole survivor on a desperate, last-chance mission - and if he fails, humanity and the Earth itself will perish. Except that right now, he doesn't know that. He can't even remember his own name, let alone the nature of his assignment or how to complete it. All he knows is that he's been asleep for a very, very long time. And he's just been awakened to find himself millions of miles from home, with nothing but two corpses for company.

It’s 1984, and life has changed beyond recognition. Airstrip One, formerly known as Great Britain, is a place where Big Brother is always watching, and nobody can hide. Except, perhaps, for Winston Smith. Whilst working at the Ministry of Truth, rewriting history, he secretly dreams of freedom. And in a world where love and sex are forbidden, where it’s hard to distinguish between friend and foe, he meets Julia and O’Brien and vows to rebel.

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him and forces his crew to evacuate while thinking him dead, Mark finds himself stranded and completely alone with no way to even signal Earth that he’s alive - and even if he could get word out, his supplies would be gone long before a rescue could arrive. But Mark isn't ready to give up yet.

Inheriting your uncle's supervillain business is more complicated than you might think. Particularly when you discover who's running the place. Charlie's life is going nowhere fast. A divorced substitute teacher living with his cat in a house his siblings want to sell, all he wants is to open a pub downtown, if only the bank will approve his loan. Then his long-lost uncle Jake dies and leaves his supervillain business (complete with island volcano lair) to Charlie. But becoming a supervillain isn't all giant laser death rays and lava pits.

Jazz Bashara is a criminal. Well, sort of. Life on Artemis, the first and only city on the moon, is tough if you're not a rich tourist or an eccentric billionaire. So smuggling in the occasional harmless bit of contraband barely counts, right? Not when you've got debts to pay and your job as a porter barely covers the rent. Everything changes when Jazz sees the chance to commit the perfect crime, with a reward too lucrative to turn down.

Reuben Jackson is the only one who still cares about Mars. In the shambles of the Great Collapse, Earth has abandoned the Mars explorers to their fate. But Reuben will make a stand for the Mars team—even against the powerfully united politicians and scientists. In too deep, he discovers hidden conspiracies and unexpected allies. As the conflict mounts on Earth, time runs down on Mars. Left to face Mars alone, Commander Donegan Moynihan and his team have no hope of surviving after their supplies are gone.

In the darkest part of the solar system lies a wormhole. Nether. Astrophysicist Cammie Skoura has joined the first research team traveling to the Nether anomaly, eager to understand the mechanics of the wormhole and to explore its possibilities as a shortcut to Alpha Centauri. But another race of ancient beings has already been here—an impossibly long time ago—leaving remnants of their vast complexes and gigantic temples built for horrific beings beyond comprehension.

The year is 2701. Following a near-fatal disaster, roughneck freelancer Roman Matthews becomes unwittingly trapped at the center of a harrowing conspiracy. Hunted by Deorum’s government, the Coalition for Prosperity, Roman must use his deadly skillset to survive against all odds.

The Dervan Empire has at last triumphed over Volanus, putting the great city to the torch, its treasures looted, temples defiled, and fields sown with salt. What little remains of Volanus is scattered across the empire, its wealth plundered and its survivors sold into slavery. It is an absolute victory for the Dervans in every way but one. Hanuvar, last and greatest general of Volanus, still lives. He now travels the length of the Dervan Empire that conquered his homeland, driven by a singular purpose—to find what remains of his people who were carried into slavery across the empire.

Imperial Death Dealer Ethan Wolfe has been dispatched to kill a terrorist at the edge of the galaxy. It was a simple mission until the Emperor and his Lord Commander outlawed and condemned him to death, without any reason. But as he goes on the run, with Hope Adair, a former smuggler, Ethan learns that his dead father was not an archaeologist but an agent of the Empire with a terrible secret. And that secret will lead him on a quest to find an ex-Imperial soldier and a being called the Guardian. Little does he know that he has a big role to play in the coming Great War with the Fallen.

For years, pilots who merely looked like soldiers were adequate. They filled the mechs. They filled roles. They supported Spann and his genetic offshoot of pure-blooded warriors known as the Superba. Spann's dream of absolute power ends with a single, crushing blow as a new enemy strikes at the Realm, leaving no survivors—followed by a mad dash to find fighters who can stand up in the old ways, using the mechs gifted to humanity by their oldest allies. Even in the midst of war, there is hope.

The vast plains of South Dakota offer Tarin solace from both his dreams of an unknown past and the rumblings of a new global war. Yet a haunting melody plays over the stillness of the grasslands, a melody he cannot escape—one that seems hungry to force him to . . . remember. When a stranger dressed like a medieval traveler enters town, the already nervous community responds with alarm. Is this man there to cause trouble like the other newcomers—those who claim to be part of a government organization observing a new illness in the area?

Seven strangers wake up in a sealed compound with no idea how they got there. They are informed by a computer-generated voice that they must complete tasks in order to leave, and that failure to complete any of the tasks or breaking any of the rules results in a strike. The first two strikes induce extreme pain. The third strike is death. As they struggle to survive without turning on each other, they have no idea that their actions and choices could doom humanity. Or save it.

When the over-driven hyperdrive on their mobile shipyard burned out, the Chhrt'ktk't abandoned it in an inhabited system along their path, hoping it would work as a decoy to buy them more time to escape the Khreetan fleet pursuing them. They didn't anticipate how far the pre-spacefaring species they turned over their broken-down maintenance facility to would subvert their plan.

The name's Lomax-Alex Lomax. I'm the one and only private eye working the mean streets of New Klondike, the Martian frontier town that sprang up forty years ago after Simon Weingarten and Denny O'Reilly discovered fossils on the Red Planet. Back on Earth, where anything can be synthesized, the remains of alien life are the most valuable of all collectibles, so shiploads of desperate treasure hunters stampeded here in the Great Martian Fossil Rush.

When the research starship Galileo vanishes without a trace, the powers-that-be are quick to bury the incident, eager to prevent escalating tensions that could lead to war. As a former POW, Soren refuses to give the ship up for lost. His daughter is one of the missing. Taking matters into his own hands, Soren starts pulling strings and calling in favors, determined to launch a clandestine mission to bring Galileo home. When an old friend offers him a ship for the operation, he expects a rusty relic headed for the scrapyard.

Tensions are running high aboard The Camelot, a deep-space exploration vessel. Spending an extended amount of time in close quarters has left most of the crew at each other’s throats, and put their veteran captain in the position of constantly playing peacemaker. As bad as things are, they get markedly worse when The Camelot unknowingly picks up a stowaway: a shapeshifting alien monster who boards their ship and begins killing the crew one by one.

Sometimes a farmer can turn a profit by diversifying his crops . . . Tom Savage and Gwen Wilder have a farm hand now, Silas Vick. And Silas has some ideas of new things they can grow out here. That might be good, since a lot of stuff got destroyed recently, meaning they'll have to wait on more equipment from Lute before continuing experiments. Tom's got other responsibilities, too, with a list that seems to be growing along with the farm. At least Lisa’s capabilities are expanding, with greater communications and teleportation capabilities. Meanwhile, Wink and Jinxie have more smuggling ...

As an out of shape nerd, Gabriel Rivera had more pressing issues than outlandish things like godhood: Evacuating the city, joining the military, and protecting his family. Simple right? Everything changed when the PAC invaded. When the grim fate of his world is revealed, Gabriel joins the Reclaimer Project to save his family. A lowly F ranker, he's weaker than even the worst recruits. Good thing he's too stubborn for his own good.

With Earth in the line of fire and invaders from the wider multiverse on their proverbial doorstep, the Milky Way has only limited time before the bridge to the wider multiverse establishes itself. What will our hero do? He peaces out, of course! Why would he join the frontlines? Instead, he finds an unexpected ally in Riseth, a fierce and clever demoness with whom he shares a powerful soul resonance.