At first, only a few things are known about the celestial object that astronomers dub Rama. It is huge, weighing more than ten trillion tons. And it is hurtling through the solar system at inconceivable speed. Then a space probe confirms the unthinkable: Rama is no natural object. It is, incredibly, an interstellar spacecraft. Space explorers and planet-bound scientists alike prepare for mankind's first encounter with alien intelligence.

The Overlords appeared suddenly over every city - intellectually, technologically, and militarily superior to humankind. Benevolent, they made few demands: unify earth, eliminate poverty, and end war. With little rebellion, humankind agreed, and a golden age began.

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.

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.

When prospector Bob Broadhead went out to Gateway on the Heechee spacecraft, he decided he would know which was the right mission to make him his fortune. Three missions later, now famous and permanently rich, Robinette Broadhead has to face what happened to him and what he is...in a journey into himself as perilous and even more horrifying than the nightmare trip through the interstellar void that he drove himself to take!

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.

The story of Island in the Sky centers around a young man, who, after brilliantly winning a space-related competition, requests a vacation on a space station as his prize. It is written with Arthur C. Clark's obvious knowledge of science, but moves at a page turning rate throughout the entire narrative. The short novel gives a realistic possibility of work and play in future space, heightened with constant excitement and action.

The time: 200 years after man's first landing on the Moon. There are permanent populations established on the Moon, Venus, and Mars. Outer space inhabitants have formed a new political entity, the Federation, and between the Federation and Earth a growing rivalry has developed. Earthlight is the story of this emerging conflict.

Time is running out for the passengers and crew of the tourist cruiser Selene, incarcerated in a sea of choking lunar dust. On the surface, her rescuers find their resources stretched to the limit by the mercilessly unpredictable conditions of a totally alien environment. A brilliantly imagined story of human ingenuity and survival, A Fall of Moondust is a tour-de-force of psychological suspense and sustained dramatic tension by the field's foremost author.

The Mote In God's Eye is their acknowledged masterpiece, an epic novel of mankind's first encounter with alien life that transcends the genre. No lesser an authority than Robert A. Heinlein called it "possibly the finest science fiction novel I have ever read".

On the world called Hyperion, beyond the law of the Hegemony of Man, there waits the creature called the Shrike. There are those who worship it. There are those who fear it. And there are those who have vowed to destroy it. In the Valley of the Time Tombs, where huge, brooding structures move backward through time, the Shrike waits for them all.

They mustn't harm a human being, they must obey human orders, and they must protect their own existence...but only so long as that doesn't violate rules one and two. With these Three Laws of Robotics, humanity embarked on a bold new era of evolution that would open up enormous possibilities, and unforeseen risks.

In what is considered one of Heinlein's most hair-raising, thought-provoking, and outrageous adventures, the master of modern science fiction tells the strange story of an even stranger world. It is 21st-century Luna, a harsh penal colony where a revolt is plotted between a bashful computer and a ragtag collection of maverick humans, a revolt that goes beautifully until the inevitable happens. But that's the problem with the inevitable: it always happens.

Adrian Tchaikovksy's critically acclaimed stand-alone novel Children of Time is the epic story of humanity's battle for survival on a terraformed planet. Who will inherit this new Earth? The last remnants of the human race left a dying Earth, desperate to find a new home among the stars. Following in the footsteps of their ancestors, they discover the greatest treasure of the past age - a world terraformed and prepared for human life. But all is not right in this new Eden.

Set against the backdrop of China’s Cultural Revolution, a secret military project sends signals into space to establish contact with aliens. An alien civilization on the brink of destruction captures the signal and plans to invade Earth. Meanwhile, on Earth, different camps start forming, planning to either welcome the superior beings and help them take over a world seen as corrupt, or to fight against the invasion.

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.

The Overlords appeared suddenly over every city - intellectually, technologically, and militarily superior to humankind. Benevolent, they made few demands: unify earth, eliminate poverty, and end war. With little rebellion, humankind agreed, and a golden age began.

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.

When Jack Harrison climbed down the short ladder from the airlock and stepped onto the debris covered soil, the ground crackled with the sound of dried leaves and twigs.

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.

There is a milestone in the evolution of every sentient race, a Tech Singularity Event, when the species achieves transcendence through its technological advances. Now the creatures known as humans are near this momentous turning point. But an armed threat is approaching from deepest space, determined to prevent humankind from crossing over that boundary - by total annihilation if necessary.

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.

At the turn of the 22nd century, scientists make a breakthrough in human spaceflight. Through a revolutionary method known as somaforming, astronauts can survive in hostile environments off Earth using synthetic biological supplementations. With the fragility of the body no longer a limiting factor, human beings are at last able to journey to neighboring exoplanets long known to harbor life. A team of these explorers, Ariadne O’Neill and her three crewmates, are hard at work in a planetary system 15 light-years from Sol, on a mission to ecologically survey four habitable worlds.

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.

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.

Liam Saunders-Chang is one of the last humans left on Mars. The son of two scientists who have been racing against time to create technology vital to humanity's survival, Liam, along with his friend Phoebe, will be on the last starliner to depart before Mars, like Earth before it, is destroyed. Or so he thinks. Because before this day is over, Liam and Phoebe will make a series of profound discoveries about the nature of time and space and find out that the human race is just one of many in our universe locked in a dangerous struggle for survival.

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.

On October 4, 1957, the Soviet Union launched Sputnik I, and the space race was born. Desperate to beat the Russians into space, NASA put together a crew of the nation's most daring test pilots: the seven men who were to lead America to the moon. The first into space was Alan Shepard; the last was Deke Slayton, whose irregular heartbeat kept him grounded until 1975. They spent the 1960s at the forefront of NASA's effort to conquer space, and Moon Shot is their inside account of what many call the 20th century's greatest feat - landing humans on another world.

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.

Seventy years ago, the interstellar supercarrier Ark Royal was the pride of the Royal Navy. But now, her weapons are outdated and her solid-state armour nothing more than a burden on her colossal hull. She floats in permanent orbit near Earth, a dumping ground for the officers and crew the Royal Navy wishes to keep out of the public eye. But when a deadly alien threat appears, the modern starships built by humanity are no match for the powerful alien weapons.