A catastrophic event renders the earth a ticking time bomb. In a feverish race against the inevitable, nations around the globe band together to devise an ambitious plan to ensure the survival of humanity far beyond our atmosphere, in outer space.

The year is 2380. The Intersolar Commonwealth, a sphere of stars some 400 light-years in diameter, contains more than 600 worlds, interconnected by a web of transport "tunnels" known as wormholes. At the farthest edge of the Commonwealth, astronomer Dudley Bose observes the impossible: Over 1,000 light-years away, a star...vanishes. It does not go supernova. It does not collapse into a black hole. It simply disappears.

Kyle Riggs is snatched by an alien spacecraft sometime after midnight. The ship is testing everyone it catches and murdering the weak. The good news is that Kyle keeps passing tests and staying alive. The bad news is the aliens who sent this ship are the nicest ones out there.

Welcome to Ringworld, an intermediate step between Dyson Spheres and planets. The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping. Larry Niven's novel, Ringworld, is the winner of the 1970 Hugo Award for Best Novel, the 1970 Nebula Award for Best Novel, and the 1972 Ditmars, an Australian award for Best International Science Fiction.

Winner of the Nebula Award for Best Novel, Red Mars is the first book in Kim Stanley Robinson's best-selling trilogy. Red Mars is praised by scientists for its detailed visions of future technology. It is also hailed by authors and critics for its vivid characters and dramatic conflicts.

For centuries, the red planet has enticed the people of Earth. Now an international group of scientists has colonized Mars. Leaving Earth forever, these 100 people have traveled nine months to reach their new home. This is the remarkable story of the world they create - and the hidden power struggles of those who want to control it.

The ice is coming. It was the last thing we expected, but the world is freezing. A new ice age has dawned. Billions have fled the glaciers. A cataclysmic war is coming. In orbit, a group of scientists are running the Winter Experiments, a last-ditch attempt to understand why the planet is cooling. None of the climate models they build make sense. But then they discover an anomaly, an unexplained variation in solar radiation...and something else. Close to the burning edge of the sun, they catch a fleeting glimpse of something that shouldn’t be there....

From early work like "Rescue Party" and "The Lion of Comarre", through classic stories including "The Star", "Earthlight", "The Nine Billion Names of God", and "The Sentinel" (kernel of the later novel and movie 2001: A Space Odyssey), all the way to later work like "A Meeting with Medusa" and "The Hammer of God", this comprehensive short story collection encapsulates one of the great science fiction careers of all time.

The best-selling, epic space adventure, Freedom's Fire: the complete series of six audiobooks, in one bundle.

A major new novel from one of science fiction's most powerful voices, Aurora tells the incredible story of our first voyage beyond the solar system. Brilliantly imagined and beautifully told, it is the work of a writer at the height of his powers.

When Chen’s parents are incinerated before his eyes by a blast of ball lightning, he devotes his life to cracking the secret of the mysterious natural phenomenon. His search takes him to stormy mountaintops, an experimental military weapons lab, and an old Soviet science station. The more he learns, the more he comes to realize that ball lightning is just the tip of a new frontier in particle physics. Although Chen’s quest provides a purpose for his life, his reasons for chasing his elusive quarry come into conflict with soldiers and scientists who have motives of their own.

They first appear as a series of dots on astronomical plates, heading from Saturn directly toward Earth. Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star. The world's frantic efforts to signal the aliens go unanswered. The first contact is hostile: the invaders blast a Soviet space station, seize the survivors, and then destroy every dam and installation on Earth with a hail of asteriods.

Vannemar Morgan's dream is to link Earth to the stars with the greatest engineering feat of all time: a 24,000-mile-high space elevator. But first he must solve a million technical, political, and economic problems while allaying the wrath of God. For the only possible site on the planet for Morgans Orbital Tower is the monastery atop the Sacred Mountain of Sri Kanda.

From the atomic age in Atlantis to a world remote in space and time, two incredible ancient races, the Arisians and the Eddorians, are in the midst of an interstellar war - with Earth as the prize.

The planet Quinta is pocked by ugly mounds and covered by a spiderweb-like network. It is a kingdom of phantoms and of a beauty afflicted by madness. In stark contrast, the crew of the spaceship Hermes represents a knowledge-seeking Earth. As they approach Quinta, a dark poetry takes over and leads them into a nightmare of misunderstanding.

Madness from the Inconstant Moon is a collection of early short science fiction works by Larry Niven, the multiple Hugo and Nebula Award-winning author of the Ringworld series. This classic collection includes "The Inconstant Moon", the basis for a forthcoming film by The Arrival producer Shawn Levy.

Brilliant government scientist Richard Seaton discovers a remarkable faster-than-light fuel that will power his interstellar spaceship, The Skylark. His ruthless rival, Marc DuQuesne, and the sinister World Steel Corporation will do anything to get their hands on the fuel. They kidnap Seaton's fiancée and friends, unleashing a furious pursuit and igniting a burning desire for revenge that will propel The Skylark across the galaxy and back.

Welcome to Ringworld, an intermediate step between Dyson Spheres and planets. The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping. Larry Niven's novel, Ringworld, is the winner of the 1970 Hugo Award for Best Novel, the 1970 Nebula Award for Best Novel, and the 1972 Ditmars, an Australian award for Best International Science Fiction.

It has been 40 years since the publication of this classic science-fiction novel that changed the way we look at the stars and ourselves. From the savannas of Africa at the dawn of mankind to the rings of Saturn as man adventures to the outer rim of our solar system, 2001: A Space Odyssey is a journey unlike any other.

A catastrophic event renders the earth a ticking time bomb. In a feverish race against the inevitable, nations around the globe band together to devise an ambitious plan to ensure the survival of humanity far beyond our atmosphere, in outer space.

Twenty years after the discovery of artificial wormholes launches Earth space exploration to unforeseeable heights, Starplex Director Keith Lansing investigates a mysterious vessel that soon threatens the station with intergalactic war.

Howard Falcon almost lost his life in an accident as the first human astronaut to explore the atmosphere of Jupiter - and a combination of human ingenuity and technical expertise brought him back. But he is no longer himself. Instead he has been changed into an augmented human: part man, part machine, and exceptionally capable.

In the year 2031, a robot probe detects traces of biological activity on Enceladus, one of Saturn's moons. This sensational discovery shows that there is indeed evidence of extraterrestrial life. Fifteen years later, a hurriedly built spacecraft sets out on the long journey to the ringed planet and its moon. The international crew is not just facing a difficult twenty-seven months: if the spacecraft manages to make it to Enceladus without incident it must use a drillship to penetrate the kilometer-thick sheet of ice that entombs the moon.

Vannemar Morgan's dream is to link Earth to the stars with the greatest engineering feat of all time: a 24,000-mile-high space elevator. But first he must solve a million technical, political, and economic problems while allaying the wrath of God. For the only possible site on the planet for Morgans Orbital Tower is the monastery atop the Sacred Mountain of Sri Kanda.

Humans call them Monument-Makers. An unknown race, they left stunning alien statues scattered on distant planets throughout the galaxy, encoded with strange inscriptions that defy translation. Searching for clues about the Monument-Makers, teams of 23rd century linguists, historians, engineers and archaeologists have been excavating the enigmatic alien ruins on a number of planets, uncovering strange, massive false cities made of solid rock. But their time is running out.

Beyond the Aquila Rift: It's shorthand for the trip no one ever hopes to make by accident. The one that will screw up the rest of your life, the one that creates the ghosts you see haunting the shadows of company bars across the whole Bubble. Men and women ripped out of time, cut adrift from families and lovers by an accident of an alien technology we use but rarely comprehend.

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.

Seventy thousand years ago, the human race almost went extinct. We survived, but no one knows how.

Until now. The countdown to the next stage of human evolution is about to begin, and humanity might not survive this time. The Immari are good at keeping secrets. For 2,000 years, they've hidden the truth about human evolution. They've also searched for an ancient enemy - a threat that could wipe out the human race. Now the search is over.

On June 30, 1908, an object fell from the sky, releasing more energy than a thousand Hiroshima bombs. A Siberian forest was flattened, but the strike left no significant crater. The anomaly came to be known as the Tunguska Event, and scientists have never agreed whether it was the largest meteor strike in recorded history - or something else. Alien artifacts have been uncovered since the 1908 event, and a new star drive is discovered.

The year is 2162. Thirty-eight years after first contact, Lord Commander Grayson St. Clair leads the Tellus Ad Astra on an unprecedented expedition to the Galactic Core, carrying more than a million scientists, diplomats, soldiers, and AIs. Despite his reservations about their alien hosts, St. Clair is deeply committed to his people - especially after they're sucked into a black hole and spat out four billion years in the future. Civilizations have risen and fallen. The Andromeda Galaxy is drifting into the Milky Way. And Earth is most certainly a distant memory.

Jan Kulozik was one of Earth's privileged elite. A brilliant young electronics engineer, he enjoyed all the blessings of a twenty-third-century civilization that survived global collapse and conquered the starts, unaware of the millions who slaved or starved to maintain his way of life. Then Jan met Sara, a beautiful agent of the rebel underground dedicated to smashing Earth's rigid caste system. Through her he discovered the truth behind the lies he'd been taught.