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.

    Once he was outbound, where the Society that ruled Earth could not reach him, he headed his starship toward the galactic core, where the unimaginable energies of the Universe wrenched the fabric of time and space and promised final escape from his captors.Then he returned to an Earth eons older than the one he'd left...a planet that had had 3,000,000 years to develop perils he had never dreamed of -- perils that became nightmares that he had to escape...somehow!

    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. Festina Ramos belongs to the well-trained, always-dwindling ranks of ECMs (Expendable Crew Members). Now she and her partner, Yarrun Derigha, have been ordered to escort the unstable Admiral Chee to Melaquin -- the feared "Planet of No Return"-- which has swallowed up countless Explorers before them without a trace.Obviously, this is meant to be the last mission for Ramos and Derigha. But it won't be, if Festina can help it.

    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.

    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.

    And suddenly uncertainty and change had come to the placid paradise that was Thalassa.

    What he hadn't expected was that when the apocalypse came, a thermonuclear blast would tear apart the fabric of time and hurl his shelter into a world with no sign of other human beings.

    The Arisians, using advanced mental technology, have foreseen the invasion of their galaxy by the corrupt and evil Eddorians, so they begin a breeding program on every planet in their universe. Their goal...to produce super warriors who can hold off the invading Eddorians.

    Ordered to destroy the comet, he instead discovers that it is actually the shell of a derelict space probe - a wreck with just enough power to emit a single electronic signal...2034: Then a reply is heard. Searching for the source of this signal that comes from outside the solar system, Nigel discovers the existence of a sentient ship. When the new vessel begins to communicate directly with him, the astronaut learns of the horrors that await humanity. For the ship was created by an alien race that has spent billions and billions of years searching for intelligent life...to annihilate it.In the Ocean of Night is a 1977 hard science fiction novel by Gregory Benford. It is the first novel in his Galactic Center Saga. It was nominated for the Nebula Award for Best Novel in 1977. It was first published as a novelette in the May/June 1972 edition of Worlds of If Science Fiction.

    The invention of the Hotline -- a constant stream of data from a star in the constellation Ophiuchus -- facilitates survival and enables the development of amazing new technologies. Then, after 400 years, humanity's unknown helpers send a bill for their services...and suddenly everything is threatened once again.The Ophiuchi Hotline was John Varley's first novel, and it received nominations for both the Hugo and Nebula awards; he later won both for his book Persistence of Vision.

    History is in chaos as billions of possible futures collide. As a conquering army mounts an invasion of neighboring realities, a handful of men and women from a dozen different timelines risk their lives to safeguard an infinity of worlds.Blending thrilling suspense with brilliant scientific speculation, Frederik Pohl's The Coming of the Quantum Cats is a triumph of the imagination by a Hugo and Nebula-winning master of science fiction."A powerful novel of parallel worlds and might-have-beens, with an eerie, amazing finish!"--David Brin

    The ultimate warriors, they are known for their deadly rages, unbreakable honor, and fierce independence. No man rules the Dorsai, but their mastery of the art of war has made them the most valuable mercenaries in the known universe. Donal Graeme is Dorsai, taller and harder than any ordinary man. But he is different as well, with talents that maze even his fellow Dorsai. And once he ventures out into the stars, the future will never be the same.

    Named after the migrant workers of America's Dust Bowl, these novels convey Blish's "history of the future," a brilliant and bleak look at a world where cities roam the Galaxy looking for work and a sustainable way of life.In the first novel, They Shall Have Stars, man has thoroughly explored the Solar System, yet the dream of going even further seems to have died in all but one man. His battle to realize his dream results in two momentous discoveries anti-gravity and the secret of immortality. In A Life for the Stars, it is centuries later and anti-gravity generations have enabled whole cities to lift off the surface of the earth to become galactic wanderers. In Earthman, Come Home, the nomadic cities revert to barbarism and marauding rogue cities begin to pose a threat to all civilized worlds. In the final novel, The Triumph of Time, history repeats itself as the cities once again journey back in to space making a terrifying discovery which could destroy the entire Universe. A serious and haunting vision of our world and its limits, Cities in Flight marks the return to print of one of science fiction's most inimitable writers.A Selection of the Science Fiction Book Club

    . . a sophisticated traveler between many worlds. But he had certainly never thought of himself as a hero.Skua September, on the other hand, never thought of himself as anything else.A matched pair, if ever there was one!When the two of them were suddenly stranded on a deadly frozen world, Ethan Fortune incredibly found himself cast in the role of Leader.And he didn't find that at all amusing . . .

    Now an even greater danger has surfaced: a threat to the existence of the universe itself.At the very heart of the galaxy is the Void, a self-contained microuniverse that cannot be breached, cannot be destroyed, and cannot be stopped as it steadily expands in all directions, consuming everything in its path: planets, stars, civilizations. The Void has existed for untold millions of years. Even the oldest and most technologically advanced of the galaxy’s sentient races, the Raiel, do not know its origin, its makers, or its purpose.But then Inigo, an astrophysicist studying the Void, begins dreaming of human beings who live within it. Inigo’s dreams reveal a world in which thoughts become actions and dreams become reality. Inside the Void, Inigo sees paradise. Thanks to the gaiafield, a neural entanglement wired into most humans, Inigo’s dreams are shared by hundreds of millions–and a religion, the Living Dream, is born, with Inigo as its prophet. But then he vanishes.Suddenly there is a new wave of dreams. Dreams broadcast by an unknown Second Dreamer serve as the inspiration for a massive Pilgrimage into the Void. But there is a chance that by attempting to enter the Void, the pilgrims will trigger a catastrophic expansion, an accelerated devourment phase that will swallow up thousands of worlds. And thus begins a desperate race to find Inigo and the mysterious Second Dreamer. Some seek to prevent the Pilgrimage; others to speed its progress–while within the Void, a supreme entity has turned its gaze, for the first time, outward. . . .From the Hardcover edition.