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.

It was January 2021, and Rick Deckard had a license to kill. Somewhere among the hordes of humans out there lurked several rogue androids. Deckard's assignment: find them and then..."retire" them. Trouble was, the androids all looked exactly like humans, and they didn't want to be found!

En route to London from New York, Flight 305 suddenly loses power and crash-lands in the English countryside, plunging a group of strangers into a mysterious adventure that will have repercussions for all of humankind. Struggling to stay alive, the survivors soon realize that the world they've crashed in is very different from the one they left. But where are they? Why are they here? And how will they get back home?

Former naval doctor Peter Crane is summoned to a remote oil platform in the North Atlantic to help diagnose a bizarre medical condition. But when he arrives, Crane learns that the real trouble lies far below on "Deep Storm", a stunningly advanced science-research facility built two miles beneath the surface on the ocean floor. The top-secret structure has been designed for one purpose: to excavate a recently discovered undersea site that may hold the answers to an ancient mystery.

When Dal Timgar, of all his medical class, was denied assignment to a general practice patrol ship going out from Hospital Earth to serve the medical needs of the Galactic Confederation, it seemed to him that his eight years of study in the great medical center of the galaxy had ended in failure. He had worked hard and stood at the head of his class, but Dal was different from his medical colleagues in one important way: he was the first son of an alien race to attempt to become a qualified physician of Hospital Earth.

Leo Graf was just your average highly efficient engineer: mind your own business, fix what's wrong, and move on to the next job. But all that changed on his assignment to the Cay Habitat, where a group of humanoids had been secretly, commercially bioengineered for working in free fall. Could he just stand there and allow the exploitation of hundreds of helpless children merely to enhance the bottom line of a heartless mega-corporation?

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.

EMASI! Each Man a Separate Individual! That is the rallying cry of the Seps, the resistance force engaged in a class war against the upper tiers of a society driven entirely by opinion polls. Those who score high, the High-Opps, are given plush apartments, comfortable jobs, every possible convenience. But those who happen to be low-opped live crowded in warrens, facing harsh lives and brutal conditions.

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.

Public Law 10927 was clear and direct. Parents were permitted to watch the genetic alterations of their gametes by skilled surgeons...only no one ever requested it. When Lizbeth and Harvey Durant decided to invoke the Law, when Dr. Potter did not rearrange the most unusual genetic structure of their future son, barely an embryo growing in the State's special vat---the consequences of these decisions threatened to be catastrophic.

Roger Torraway watched in horror as the monster lurched, toppled over and died. Project Man Plus had gone suddenly and drastically wrong. The race to colonize Mars was too important, too costly, and America was already too committed, for plans to be scrapped. They would have to make a new Martian. And Roger Torraway was it, candidate for the endless surgery, operation after painful operation, that would enable him to survive on that faraway planet.

Delmak-O is a dangerous planet. Though there are only 14 citizens, no one can trust anyone else and death can strike at any moment. The planet is vast and largely unexplored, populated mostly by gelatinous cube-shaped beings that give cryptic advice in the form of anagrams. Deities can be spoken to directly via a series of prayer amplifiers and transmitters, but they may not be happy about it. And the mysterious building in the distance draws all the colonists to it, but when they get there each sees a different motto on the front.

Somebody’s interfering with time. The Doctor, Rose and Captain Jack arrive on modern-day Earth to find the culprit - and discover a Neanderthal Man, twenty-eight thousand years after his race became extinct. Only a trip back to the primeval dawn of humanity can solve the mystery. Who are the mysterious humans from the distant future now living in the distant past? What hideous monsters are trying to escape from behind the Grey Door? Is Rose going to end up married to a caveman?

Babel-17, winner of the Nebula Award for best novel of the year, is a fascinating tale of a famous poet bent on deciphering a secret language that is the key to the enemy's deadly force, a task that requires she travel with a splendidly improbable crew to the site of the next attack.

Roger Torraway watched in horror as the monster lurched, toppled over and died. Project Man Plus had gone suddenly and drastically wrong. The race to colonize Mars was too important, too costly, and America was already too committed, for plans to be scrapped. They would have to make a new Martian. And Roger Torraway was it, candidate for the endless surgery, operation after painful operation, that would enable him to survive on that faraway planet.

Vergil's innovative experiment restructuring the cells of a common virus becomes a nightmare when, in order to save his research, Vergil injects the entire culture into his bloodstream.

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.

Moth was a beautiful planet, the only one with wings - two great golden clouds suspended in space around it. Here was a wide-open world for any venture a man might scheme. The planet attracted unwary travelers, hardened space-sailors, and merchant buccaneers - a teeming, constantly shifting horde that provided a comfortable income for certain quick-witted fellows like Flinx and his pet flying snake Pip.

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.

Ed Fletcher is a real estate agent with a normal life, until one day he leaves the house for work a few minutes later than he should have. He arrives at a terrifying, grey, ash world. Ed rushes home and tells his wife, Ruth, who goes back to the office with him. When they return, everything is normal. But he soon realizes people and objects have subtly changed.

Mankind was beginning its third leap into the Galaxy, but Old Earth had so long kept to herself that her people were unable to travel safely among the rough-and-tumble cultures that had evolved on distant worlds. That annoyed Earth's rulers, for Hobart Floyt--a minor Terran bureaucrat-- had been left a mysterious inheritance by the deceased ruler of a small but wealthy interstellar empire.

Under the benevolent leadership of the League of Peoples, there is no war, little crime, and life is sacred...unless you're an Explorer. The ugly, the flawed, the misfit, the deformed, they are the unwanted, flung to the farthest corners of the galaxy to investigate hostile planets and strange, vicious creatures. Out there, there are a thousand different - and terrible - ways to die.

Earth is trapped in the crossfire of an unwinnable war between two alien civilizations. Its leader is perpetually on the verge of death. And on top of that, a new drug has just entered circulation - a drug that haphazardly sends its users traveling through time. In an attempt to escape his doomed marriage, Dr. Eric Sweetscent becomes caught up in all of it. But he has questions: Is Earth on the right side of the war? Is he supposed to heal Earth’s leader or keep him sick? And can he change the harrowing future that the drug has shown him?

Niblock House is a rising executive at General Technics, one of a few all-powerful corporations. His work is leading General Technics to the forefront of global domination, both in the marketplace and politically - it's about to take over a country in Africa. Donald Hogan is his roommate, a seemingly sheepish bookworm. But Hogan is a spy, and he's about to discover a breakthrough in genetic engineering that will change the world...and kill him. Society is squeezed into hive-living madness by god-like mega computers and mass-marketed psychedelic drugs.

The first interstellar ship, John Glenn, fled a solar system populated by rogue AIs and machine/human hybrids, threatened by too much nanotechnology, and rife with political dangers. The John Glenn’s crew intended to terraform the nearly pristine planet Ymir in hopes of creating a utopian society that will limit intelligent technology, but by some miscalculation they have landed in the wrong system.

Rhoma Grace is a 16-year-old student from House Cancer with an unusual way of reading the stars. While her classmates use measurements to make accurate astrological predictions, she looks up at the night sky and makes up stories.

Geoff and his friends live in Phocaea, a distant asteroid colony on the Solar System's frontier. They're your basic high-spirited young adults, enjoying such pastimes as hacking matter compilers to produce dancing skeletons that prance through the low-gee communal areas, using their rocket-bikes to salvage methane ice shrapnel that flies away when the colony brings in a big (and vital) rock of the stuff, and figuring out how to avoid the ubiquitous surveillance motes.

Cities all around the world reported strange alien vessels descending. Some saw them as the heralds of a new age; others fired everything they had at them. All were taken as the beams lashed down and drew them into the sky. Dean was left behind, seemingly the last man on Earth. A trail of clues left by his dead wife guides Dean on a perilous journey across America and beyond to learn the truth behind the mysterious ships and save humanity from its doom.

They are the Voltarians of Voltar - an empire 110 planets strong. They are already among us. And the invasion is about to begin...in a hundred years or so. Or is it? The truth is far more sinister. Undercover, underground, and out of sight, the invaders plan what may in fact be a massive diversion. In the darkest recesses of Voltar’s Coordinated Information Apparatus (otherwise known as the CIA), a tyrant of terror sets out to exploit the invasion in order to seize power. All that stands in his way is a planet that doesn’t exist.