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.

A Fire Upon the Deep is the big, breakout book that fulfills the promise of Vinge's career to date: a gripping tale of galactic war told on a cosmic scale. Thousands of years hence, many races inhabit a universe where a mind's potential is determined by its location in space, from superintelligent entities in the Transcend, to the limited minds of the Unthinking Depths, where only simple creatures and technology can function.

Harry Keogh is the man who can talk to the dead, the man for whom every grave willingly gives up its secrets, the one man who knows how to travel effortlessly through time and space to destroy the vampires that threaten all of humanity.

Surrounded by secrecy, it is home to the wildest dreams and darkest nightmares. Incredible amounts of money have been lavished on it. The best minds of two generations have labored to build it. And somehow, bit by bit, it is claiming the Earth's most valuable resource - its children.

Bent on taking over the earth, the deadly Thone have planted a monstrous device on our planet's surface. Trapped inside is a group of scientists, spies, and innocent bystanders. Part maze, part torture chamber, part laboratory, the house of doors is a test. If its captives survive, the Thone will withdraw from earth and leave us in peace.

Untouched by Human Hands consists of 13 stories of beings who dwell on the strange borders of reality. Some of these stories tell of people you know or of events that might happen - but haven't yet. Some will take you to the furthermost reaches of the sky and to planets whose names are unknown this side of Arcturus. And some - perhaps the richest and most memorable of these stories - open into the interior of strange minds to reveal the reflection of ourselves.

After more than two hundred years as a corpsicle, Jaybee Corbell awoke in someone else’s body and under threat of instant annihilation if he made a wrong move while they were training him for a one-way mission to the stars. But Corbell bided his time and made his own move. Once he was outbound, where the society that ruled Earth could not reach him, he headed his starship toward the galactic core.

This book contains 26 of the greatest science fiction stories ever written. They represent the considered verdict of the Science Fiction Writers of America, those who have shaped the genre and who know, more intimately than anyone else, what the criteria for excellence in the field should be. The authors chosen for the Science Fiction Hall Fame are the men and women who have shaped the body and heart of modern science fiction; their brilliantly imaginative creations continue to inspire and astound new generations of writers and fans.

For millions of years, the part of the galaxy containing our solar system has been moving through a vast force field that has been inhibiting certain electromagnetic and electrochemical processes and, thus, certain neurotic functions. When Earth escapes the inhibiting field, synapse speed immediately increases, causing a rise in intelligence, which results in a transfigured humanity reaching for the stars, leaving behind our earth to the less intelligent humans and animal life-forms.

Jenkins was a robot. He was built to be the perfect worker, tireless and uncomplaining. But, quite unexpectedly, he also became a close companion to generation after generation of his owners as the human race matured, moved beyond the confines of its once tiny planet, and eventually changed beyond all recognition.

Deathworld centers on Jason dinAlt, a professional gambler who uses his somewhat erratic psionic abilities to tip the odds in his favor. He is challenged by a man named Kerk Pyrrus (who turns out to be the ambassador from the planet Pyrrus) to turn a large amount of money into an immense sum by gambling at a government-run casino. He succeeds and survives the planetary government's desperate efforts to steal back the money.

A whisperjewel has summoned Dirk t’Larien to Worlorn, and a love he thinks he lost. But Worlorn isn’t the world Dirk imagined, and Gwen Delvano is no longer the woman he once knew. She is bound to another man, and to a dying planet that is trapped in twilight. Gwen needs Dirk’s protection, and he will do anything to keep her safe, even if it means challenging the barbaric man who has claimed her. But an impenetrable veil of secrecy surrounds them all, and it’s becoming impossible for Dirk to distinguish between his allies and his enemies.

With an introduction by J. J. Pierce, this volume features the 12 most important stories by Cordwainer Smith, a unique writer who has fused wonder and poetry into imaginative tales that transcend both science and fiction.

Sixteen all-new stories by science fiction's top talents, collected by best-selling author George R. R. Martin and multiple-award-winning editor Gardner Dozois.

Earth is an old planet, and her teeming masses are running out of resources - and time. It is up to men such as Jeff Holman to discover a haven for Earth’s millions. Altair VI is one such planet, and Holman is determined to transform this world into one where the human race can survive. Star probes long ago informed Earth that Altair VI had a flourishing ecology with one very tough beast at the top of the food chain, one that will have to be dealt with before the human colony ships arrive. The beast is not only tough, it is as smart as a man. Holman is faced with a soul-wrenching decision - for to make Altair VI habitable for humans, all native life must die.