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.

For Oxford student Kivrin, traveling back to the 14th century is more than the culmination of her studies - it's the chance for a wonderful adventure. For Dunworthy, her mentor, it is cause for intense worry about the thousands of things that could go wrong.

An errant encounter with a passing star has flung Earth away from its old Solar System into the dark and cold of deep space. With the entire atmosphere frozen as chemical snow dozens of feet deep, one last family struggles to survive. But what are they to think when they see figures moving in the city ruins? Are Earth's dead coming back to life?

Here are the greatest stories of one of the greatest writers working in any genre today. All ten of the stories gathered here are Hugo or Nebula award winners - some even have the distinction of winning both. With a new Introduction by the author and personal afterwords to each story, plus a special look at three of Willis' unique public speeches - this is unquestionably the collection of the season, an audiobook that every Connie Willis fan will treasure.

It is the year 12,020 GE and Emperor Cleon I sits uneasily on the Imperial throne of Trantor. Here in the great multidomed capital of the Galactic Empire, 40 billion people have created a civilization of unimaginable technological and cultural complexity. Yet Cleon knows there are those who would see him fall - those whom he would destroy if only he could read the future.

This selection of some of Asimov's most enduring and unforgettable stories is read by the author himself. These vintage tales encompass the full range of Asimov's versatility, while displaying his puckish sense of humor.

The Eternals, the ruling class of the Future, had the power of life and death not only over every human being but over the very centuries into which they were born. Past, Present, and Future could be created or destroyed at will. You had to be special to become an Eternal. Andrew Harlan was special. Until he committed the one unforgivable sin - falling in love. Eternals weren’t supposed to have feelings. But Andrew could not deny the sensations that were struggling within him. He knew he could not keep this secret forever. And so he began to plan his escape.

 A collection of 20 classic short stories by Isaac Asimov, author of the Foundation series, featuring the definitive and only in-print version of “Nightfall”.

For decades, The Year's Best Science Fiction has been the most widely read short science fiction anthology of its kind. Now, after 35 annual collections comes the ultimate in science fiction anthologies. In The Very Best of the Best, legendary editor Gardner Dozois selects the finest short stories for this landmark collection, including short fiction from authors such as Charles Stross, Michael Swanwick, Nancy Kress, Greg Egan, Stephen Baxter, Pat Cadigan, and any many more.

In a rare blend of scientific insight and writing as elegant as the theories it explains, one of the world's leading string theorists, peels away the layers of mystery surrounding string theory to reveal a universe that consists of 11 dimensions where the fabric of space tears and repairs itself, and all matter-from the smallest quarks to the most gargantuan supernovas-is generated by the vibrations of microscopically tiny loops of energy.

Bradbury's Mars is a place of hope, dreams, and metaphor - of crystal pillars and fossil seas - where a fine dust settles on the great, empty cities of a silently destroyed civilization. It is here the invaders have come to despoil and commercialize, to grow and to learn - first a trickle, then a torrent, rushing from a world with no future toward a promise of tomorrow. The Earthman conquers Mars...and then is conquered by it, lulled by dangerous lies of comfort and familiarity, and enchanted by the lingering glamour of an ancient, mysterious native race.

The cause of the devastation is a phenomenon that will come to be known as The Pulse, and the delivery method is a cell phone. Everyone's cell phone. Clay and the few desperate survivors who join him suddenly find themselves in the pitch-black night of civilization's darkest age, surrounded by chaos, carnage, and a human horde that has been reduced to its basest nature...and then begins to evolve.

This volume contains a variety of imaginative stories from both famous and not-so-famous science fiction writers.

The Collected Works of Philip K. Dick is a collection of 11 science fiction stories by Philip K. Dick.

In the realm of Alera, where people bond with the furies - elementals of earth, air, fire, water, and metal - 15-year-old Tavi struggles with his lack of furycrafting. But when his homeland erupts in chaos - when rebels war with loyalists and furies clash with furies - Tavi's simple courage will turn the tides of war.