John Varley's monumental trilogy - Titan, Wizard, and Demon - has achieved cult status, hailed as a modern triumph of the imagination by critics and fans. It begins with humankind's exploration of a massive satellite orbiting Saturn. It culminates in a shocking discovery: the satellite is a giant alien being. Her name is Gaea. Her awesome interior is mind-boggling - because it is a mind. A mind that calls out to explorers...and transforms all who enter.

As Chinese and US spacecraft compete to be the first to land on Mars, a former astronaut, his cousin, and four teens from Florida decide to take matters into their own hands. If they can quickly build their own space-worthy ship using scrap metal, appliances, and power tools, they have a chance to come from behind - thanks to an inventive new power source that can propel them to the Red Planet within three days. No guts, no glory.

Fleeing Earth after an alien invasion, the human race stands on the threshold of evolution. Their new home is Luna, a moon colony blessed with creature comforts, prolonged lifespans, digital memories, and instant sex changes. But the people of Luna are bored, restless, suicidal - and so is the computer that monitors their existence.

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".

Not content with investing his fortune and watching it grow, multibillionaire Howard Christian buys rare cars that he actually drives, acquires collectible toys that he actually plays with, and builds buildings that defy the imagination. But now his restless mind has turned to a new obsession: cloning a mammoth. In a barren province of Canada, a mammoth hunter financed by Christian has made the discovery of a lifetime: an intact frozen woolly mammoth. But what he finds during the painstaking process of excavating the huge creature baffles the mind.

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.

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.

Litany of the Long Sun contains the full texts of Nightside the Long Sun and Lake of the Long Sun that together make up the first half of The Book of the Long Sun. This great work is set on a huge generation starship in the same future as the classic Book of the New Sun (also available in two volumes from Orb).

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.

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!

First prize in the Skyway Soap slogan contest was an all-expenses-paid trip to the moon. The consolation prize was an authenticspace suit, and when scientifically minded high school senior Kip Russell wonit, he knew for certain he would use it one day to make a sojourn of his own tothe stars. But "one day" comes sooner than he thinks when he tries the suit on in his backyard - and finds himself worlds away, a prisoner aboard a space pirate's ship.

For fans of The Martian, an extraordinary new thriller of the future from number one New York Times - best-selling and Pulitzer Priz - winning author John Sandford and internationally known photo-artist and science fiction aficionado Ctein. The year is 2066. A Caltech intern inadvertently notices an anomaly from a space telescope - something is approaching Saturn, and decelerating. Space objects don’t decelerate. Spaceships do.

. C. “Scar” Gordon was on the French Riviera recovering from a tour of combat in Southeast Asia, but he hadn’t given up his habit of scanning the personals in the newspaper. One ad in particular leapt out at him: "Are you a coward? This is not for you. We badly need a brave man. He must be 23 to 25 years old, in perfect health, at least six feet tall, weigh about 190 pounds, fluent English with some French, proficient with all weapons, some knowledge of engineering and mathematics essential...."

After the fall of the American Ayatollahs as foretold in Stranger in a Strange Land and chronicled in Revolt in 2100, the United States of America at last fulfills the promise inherent in its first Revolution: for the first time in human history there is a nation with Liberty and Justice for All. No one may seize or harm the person or property of another, or invade his privacy, or force him to do his bidding. Americans are fiercely proud of their re-won liberties and the blood it cost them; nothing could make them forswear those truths they hold self-evident. Nothing except the promise of immortality…

When a stranger attempting to deliver a cryptic message is shot dead at his dinner table, Richard Ames is thrown headfirst into danger, intrigue, and other dimensions where Lazarus Long still thrives, where Jubal Harshaw lives surrounded by beautiful women, and where a daring plot to rescue the sentient computer called Mike can change the direction of all human history.