In one of the most powerful and thought-provoking novels of his remarkable career, Orson Scott Card's Pastwatch interweaves a compelling portrait of Christopher Columbus with the story of a future scientist who believes she can alter human history from a tragedy of bloodshed and brutality to a world filled with hope and healing.

    In the twenty-third century pioneers have escaped the crowded earth for life in self-sustaining orbital colonies.  One of the colonies, Rotor, has broken away from the solar system to create its own renegade utopia around an unknown red star two light-years from Earth:  a star named Nemesis.  Now a fifteen-year-old Rotorian girl has learned of the dire threat that nemesis poses to Earth's people--but she is prevented from warning them.  Soon she will realize that Nemesis endangers Rotor as well.  And so it will be up to her alone to save both Earth and Rotor as--drawn inexorably by Nemesis, the death star--they hurtle toward certain disaster.

    Each sought his own brand of happiness. But none could have guessed what awaited them. Not even in a million years....

    NASA, NATO, and the UN sent explorers to the asteroid's surface...and discovered marvels and mysteries to drive researchers mad.For the Stone was from space--but perhaps not our space; it came from the future-but perhaps not our future; and within the hollowed asteroid was Thistledown. The remains of a vanished civilization. A human--English, Russian, and Chinese-speaking--civilization. Seven vast chambers containing forests, lakes, rivers, hanging cities...And museums describing the Death; the catastrophic war that was about to occur; the horror and the long winter that would follow. But while scientists and politicians bickered about how to use the information to stop the Death, the Stone yielded a secret that made even Earth's survival pale into insignificance.

    On an island with a glass shore - relic of some even more ancient conflict - she discovers she is to be hunted by the Huhsz, a religious cult which believes she is the last obstacle before their faith's apotheosis. She has to run, knowing her only hope of finally escaping the Huhsz is to find the last of the ancient, apocalyptically powerful but seemingly cursed Lazy Guns. But that is just the first as well as the final step on a search that takes her on an odyssey through the exotic Golterian system and results in both a trail of destruction and a journey into her own past, as well as that of her family and the system itself; a journey that changes everything.

    Charles Babbage perfects his Analytical Engine and the computer age arrives a century ahead of its time. And three extraordinary characters race toward a rendezvous with history - and the future: Sybil Gerard - dishonored woman and daughter of a Luddite agitator; Edward "Leviathan" Mallory - explorer and paleontologist; Laurence Oliphant - diplomat and spy. Their adventure begins with the discovery of a box of punched Engine cards of unknown origin and purpose. Cards someone wants badly enough to kill for...Part detective story, part historical thriller, The Difference Engine is the first collaborative novel by two of the most brilliant and controversial science fiction authors of our time. Provocative, compelling, intensely imagined, it is a startling extension of Gibson's and Sterling's unique visions - in a new and totally unexpected direction!

    Machines soared through the air, churned through the seas, crawled across the surface, pushing ever forward, carrying death. Earth was engaged in titanic struggle. Germany, Russia, France, China, Japan: the maps were changing day by day. The hostilities spread in ever-widening ripples of destruction: Britain, Italy, Africa...The fate of the world hung in the balance. Then the real enemy came. Out of the dark of night, out of the soft glow of dawn, out of the clear blue sky came an invasion force the likes of which Earth had never known - and worldwar was truly joined. The invaders were inhuman and they were unstoppable. Their technology was far beyond our reach, and their goal was simple. Fleetlord Atvar had arrived to claim Earth for the Empire. Never before had Earth's people been more divided. Never had the need for unity been greater. And grudgingly, inexpertly, humanity took up the challenge. In this epic novel of alternate history, Harry Turtledove takes us around the globe. We roll with German panzers; watch the coast of Britain with the RAF; and welcome alien-liberators to the Warsaw ghetto. In tiny planes we skim the vast Russian steppe, and we push the envelope of technology in secret labs at the University of Chicago. Turtledove's saga covers all the Earth, and beyond, as mankind - in all its folly and glory - faces the ultimate threat; and a turning point in history shows us a past that never was and a future that could yet come to be...

    The Wersgorix, whose scouting ship it is, are quite expert at taking over planets, and having determined from orbit that this one was suitable, they initiate standard world-conquering procedure. Ah, but this time it's no mere primitives the Wersgorix seek to enslave; they've launched their invasion against free Englishmen! In the end, only one alien is left alive; and Sir Roger's grand vision is born. He intends for the creature to fly the ship first to France to aid his King, then on to the Holy Land to vanquish the infidel. Unfortunately, he has not allowed for the treachery of the alien pilot, who instead takes the craft to his home planet, where, he thinks, these upstart barbarians will have no choice but to surrender. But that knavish alien little understands the indomitable will and clever resourcefulness of Englishmen, no matter how great the odds against them. . .

    Titan, an independent republic, was originally colonized from Earth three generations earlier. Duncan's initial challenge is to prepare, physically and intellectually, for the 500-million-mile trip to Earth. Once there, he is caught up in a sweep of new experiences, including the social and political whirl in Washington, a strange visit to a carefully preserved ancient city once prominent in the 20th century, and a search for and meeting with a woman he loved since she visited Titan years before.

    Helliconia is emerging from its centuries-long winter. The tribes of the equatorial continent emerge from their hiding places and are again able to dispute possession of the planet with the ferocious phagors. In Oldorando, love, trade and coinage are being redisovered,This is the first volume of the Helliconia Trilogy -- a monumental saga that goes beyond anything yet created by this master among today's imaginative writers.

    Avalon seems perfect, a verdant, livable world still in its prehistoric age. The biologists and engineers who busy themselves planting and building scoff at the warnings of professional soldier Cadmann Weyland until a large, unnaturally fast and cunning predator begins stalking the colony. Learning how to kill the beast is only the first step, for they must then reevaluate their entire understanding of Avalon's ecology.

    Here in one monumental volume are all 21 of the stories, novellas and novels making up Heinlein's famous Future History—the rich, imaginative architecture of Man's destiny that many consider his greatest and most prophetic work.Contents:* Introduction - Damon Knight* Life-Line* The Roads Must Roll* Blowups Happen* The Man Who Sold the Moon* Delilah and the Space-Rigger* Space Jockey* Requiem* The Long Watch* Gentleman, Be Seated* The Black Pits of Luna* "It's Great to Be Back!"* "—We Also Walk Dogs"* Searchlight* Ordeal in Space* The Green Hills of Earth* Logic of Empire* The Menace from Earth* "If This Goes On—"* Coventry* Misfit* Methuselah's Children

    Did some cryptic patron race begin the job long ago, then abandon us? Or did we leap all by ourselves? That question burns, yet a greater mystery looms ahead, in the furnace of a star. Under the caverns of Mercury, Expedition Sundiver prepares for the most momentous voyage in our history – into the boiling inferno of the sun, seeking our destiny in the cosmic order of life.

    1 RefugeeCALIGULA OF THE STARSThough he was later accused of every crime and sexual perversion in the galaxy, Hope Hubris began as an innocent. Because he defended his older sister against the violent lusts of a wealthy scion, Hope and his peasant family were forced to flee Callisto, one of the moons of Jupiter. Pursued by the bloodthirsty scions across the airless desert, they barely escaped with their lives. The illegal space bubble was overcrowded with refugees, all hoping to reach Jupiter for asylum.But the space travelers had not reckoned on the terrible threat of high space-the pirates, barbaric men who rape, rob, and murder, with no thought but to satisfy their bestial appetites. It will take all Hope's ingenuity to survive, but the atrocities he witnesses will never die. There is only one way he can be rid of them . . . REVENGE

    He arrives on the frozen continent and immediately begins making contact with the various scientific and political factions that comprise Antarctic society.What he finds is an interesting blend of inhabitants who don't always mesh well but who all share a common love of Antarctica and a fierce devotion to their life there. He also begins to uncover layers of Antarctic culture that have been kept hidden from the rest of the world, and some of them are dangerous indeed. Things are brought to a head when the saboteurs—or “ecoteurs” as they call themselves—launch an attack designed to drive humans off the face of Antarctica.