When an experiment to study quantum uncertainty goes spectacularly wrong, physics student Bill Rustad and his friends find that they have accidentally created an inter-dimensional portal. They connect to Outland - an alternate Earth with identical geology, but where humans never evolved. The group races to establish control of the portal before the government, the military, or evildoers can take it away. Then everything changes when the Yellowstone supervolcano erupts in an explosion large enough to destroy civilization and kill half the planet.

Zack Lightman has never much cared for reality. He vastly prefers the countless science-fiction movies, books, and videogames he's spent his life consuming. And too often, he catches himself wishing that some fantastic, impossible, world-altering event could arrive to whisk him off on a grand spacefaring adventure.

The 26th century. Humanity has expanded beyond Earth’s system to hundreds of planets that colonists now call home. But the United Earth Government and the United Nations Space Command is struggling to control this vast empire. After exhausting all strategies to keep seething colonial insurrections from exploding into a full-blown interplanetary civil war, the UNSC has one last hope.

Enjoy 15 scintillating tales in this eclectic collection where characters seek honor, truth, retribution, and in one case, a place to sell 300-year-old Lavian brandy.

When itinerant cave diver James Tighe receives an invitation to billionaire Nathan Joyce's private island, he thinks it must be a mistake. But Tighe's unique skill set makes him a prime candidate for Joyce's high-risk venture to mine a near-Earth asteroid - with the goal of kick-starting an entire off-world economy. The potential rewards and personal risks are staggering, but the competition is fierce, and the stakes couldn't be higher. Isolated and pushed beyond their breaking points, Tighe and his fellow 21st-century adventurers must rely on each other to survive....

Earth has been destroyed, the entire solar system turned to dust by a cataclysmic event known as the Fracture. Now, the last survivors of humanity live on vast arkships drifting through the Cluster, doing what they can to survive in a hostile ever-changing environment. When the arkship Obsidian is attacked, Wynn awakes in an escape pod fleeing from a huge space battle, unable to remember who he is. Hunted by a killer robot, the forces of a rival arkship, and the Church of the Infinite, Wynn must survive long enough to unlock his lost memories, discover who is behind the attack and take his revenge.

Jeff Dolan always wanted to be an astronaut. After helping a private space company build a ship that can travel to Saturn's largest moon in five months, he gets his chance. Shortly after launch, a devastating malfunction forces Jeff and the crew to make a choice: continue to Titan or go back home. As the truth about their mission unravels, one thing is clear: Someone on Earth knew about the system flaw and covered it up. Yet surviving the journey isn't the crew's only concern. Even if they make it to Titan, they will face another problem: Something is already there.

The Tantalus 13 survey expedition went off the rails as soon as Mary Ketch and the crew of the Diamelen learned that the thing beneath their feet wasn’t a planet. An impossibly vast and ancient artificial structure lies below, hidden from the universe under a façade of cratered stone. SCARAB arrived on Tantalus 13 two years ago. An artificially intelligent, self-constructing factory, it was supposed to aid the crew in their mission, to meet their every need.

On humanity's first extra-solar mission, the exploration vessel Magellan, or, as she prefers, "Maggie", discovers an alien artifact. Deciding that finding advanced alien life is too important to ignore, Captain Allison Ridgeway chooses to return to Earth while ordering her crew to reverse engineer technology far beyond anything back home. Meanwhile, at mission control, the governments struggle to maintain the existence of aliens a secret while also combating bureaucracy, the military industrial complex, and everyone else who wants a piece of what could skyrocket humanity into a new technological age.

The urge to explore and discover is a natural and universal one, and the edge of the unknown is expanded with each passing year as scientific advancements inch us closer and closer to the outer reaches of our solar system and the galaxies beyond them. Generations of writers have explored these new frontiers and the endless possibilities they present in great detail. The Final Frontier delivers stories from across this literary spectrum, a reminder that the universe is far large and brimming with possibilities than we could ever imagine, as hard as we may try.

Aerospace tycoon Gordon Elliot Lee cannot stand idly by while a mysterious alien presence from Delta Pavonis bears down upon mankind's only home. Shut out from NASA and military support, Gordon is forced to go it alone, to sow the seeds for an entirely new sort of planetary defense: a space-based naval force.

Fleet of Worlds takes a closer look at Human-Puppeteer (Citizen) relations and the events leading up to Niven's first Ringworld novel. Kirsten Quinn-Kovacks is among the best and brightest of her people. She gratefully serves the gentle race that rescued her ancestors from a dying starship, gave them a world, and nurtures them still. If only the Citizens knew where Kirsten's people came from.

Fifty years ago, Mira, humanity's last hope to find new resources, exited the solar system bound for Proxima Centauri B. Seven years into her mission, all transmissions ceased without warning. Mira and her crew were presumed lost. Humanity, unified during her construction, splintered into insurgency and rebellion.

Kalian Gaines has a secret; he just doesn't know it yet. He looks like us, he lives like us...but he is not one of us. Kalian knows nothing outside of his mundane life teaching history on 30th-century Earth, until a day like any other triggers a series of events that will tie his fate to that of humanity. A human handprint, embedded into a rock with alien script, is discovered on a moon that mankind has never set foot on. This discovery holds a secret, which will sweep Kalian into the heart of a conspiracy that has corrupted the galaxy for 200,000 years.

When you’re out in the black wilds of space you might encounter warring pirate factions, rogue planets, or even find yourself on the wrong side of the Royal Union, the ruling government of the Triumph galaxy. Unfortunately for Halstaan Cross, it's all three.