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.

    An odyssey of discovery, from a shattered society through the solar system with a handful of men and women who ride a cold, hurtling ball of ice to the shaky promise of a distant, unknowable future.

    It is the monumental story of a Galactic Empire in decline, and the secret society of scientists who seek to shorten the inevitable Dark Age with the science of psychohistory. Now, with the permission -- and blessing -- of the Asimov estate, the epic saga continues.Fate -- and a cruel Emperor's arbitrary power -- have thrust Hari Seldon into the First Ministership of the Empire against his will. As the story opens, Hari is about to leave his quiet professorship and take on the all but impossible task of administering 25 million inhabited worlds from the all-steel planet of Trantor. With the help of his beautiful bio-engineered "wife" Dors and his alien companion Yugo, Seldon is still developing the science that will transform history, never dreaming that it will ultimately pit him against future history's most awesome threat.

    Humanity has made it to the stars. Fassin Taak, a Slow Seer at the Court of the Nasqueron Dwellers, will be fortunate if he makes it to the end of the year. The Nasqueron Dwellers inhabit a gas giant on the outskirts of the galaxy, in a system awaiting its wormhole connection to the rest of civilization. In the meantime, they are dismissed as decadents living in a state of highly developed barbarism, hoarding data without order, hunting their own young & fighting pointless formal wars. Seconded to a military-religious order he's barely heard of—part of the baroque hierarchy of the Mercatoria, the latest galactic hegemony— Taak has to travel again amongst the Dwellers. He is in search of a secret hidden for half a billion years. But with each day that passes a war draws closer—a war threatening to overwhelm everything & everyone he's ever known.

    A hidden stargate hurls him and his passengers to the Well World, the master control planet for the cosmos created by the now-gone godlike race who designed the universe. Now someone wants to find the Well of Souls to seize control of all the cosmos--and it's up to Nathan to stop them.

    Adele Mundy is a scholar with no money and no prospects since her family was massacred for conspiring against the Government of Cinnabar. Kostroma is a wealthy planet which depends on diplomacy to stay independent in a galaxy whose two great powers, Cinnabar and the Alliance, battle for supremacy. In a few hours, diplomacy is going to fail Kostroma. Daniel, Adele, and the scratch crew they gather aren't much to stand in the way of a powerful invasion fleet, but just possibly they're enough.

    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.

    Teaming up with fellow SF writer Edward M. Lerner, Fleet of Worlds takes a closer look at the Human-Puppeteer (Citizens) relations and the events leading up to Niven's first Ringworld novel. Kirsten Quinn-Kovacs is among the best and brightest of her people. She gratefully serves the gentle race that rescued her ancestors from a dying starship, gave them a world, and nurtures them still. If only the Citizens knew where Kirsten's people came from….A chain reaction of supernovae at the galaxy's core has unleashed a wave of lethal radiation that will sterilize the galaxy. The Citizens flee, taking their planets, the Fleet of Worlds, with them.Someone must scout ahead, and Kirsten and her crew eagerly volunteer. Under the guiding eye of Nessus, their Citizen mentor, they explore for any possible dangers in the Fleet's path--and uncover long-hidden truths that will shake the foundations of worlds.

    The final exam for Dr. Matson's Advanced Survival class was meant to be just that: only a test. But something has gone terribly wrong...and now Rod Walker and his fellow students are stranded somewhere unknown in the universe, beyond contact with Earth, at the other end of a tunnel in the sky. Stripped of all comforts, hoping for a passage home that may never appear, the castaways must band together or perish. For Rod and his fellow survivors, this is one test where failure is not an option....

    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.

    Dominant aliens allow humans to the stars only as mercenaries. Swordsman Kana and his comrades, betrayed by Central Command, march across hostile planet Fronn. Star Rangers 1953, The Last Planet 1955. 4K years later, telepath Kartr and Patrollers crash on a beautiful unknown yet familiar world and seek the source of a beacon to safety.

    Now he expands his magnificent epic into the volatile 1960s, when the space race is in its infancy and humanity must face its greatest challenge: alien colonization of planet Earth.Yet even in the shadow of this inexorable foe, the United States, the Soviet Union, and Nazi Germany are unable to relinquish their hostilities and unite against a massive new wave of extraterrestrials. For all the countries of the world, this is the greatest threat of all. This time, the terrible price of defeat will be the conquest of our world, and perhaps the extinction of the human race itself.

    The age of star formation is long past. Yet there is life here, feeding off the energies of the stellar remnants, and there is mind, a tremendous galaxy-spanning intelligence each of whose thoughts lasts a hundred thousand years. And this mind cradles memories of a long-gone age when a more compact universe was full of light... The 27th century: Proxima Centauri, an undistinguished red dwarf star, is the nearest star to our sun. How would it be to live on such a world?

    The Inner World leaders of the Terran Federation seem to have forgotten this simple truth. After fighting the Khanate—with the Fringe Worlds to supply the raw material and the fighting men—the Inner Worlds found it hard to give up the powers they had seized during the war. So they decided not to—rather than allow the rapidly expanding Fringe Worlds representation in the Federation, they are inviting the Khanate in, to keep the colonial upstarts in their place. The Fringers have only one answer to that:

    The Terran explorers have made an uneasy truce with the Sholen, their first extraterrestrial contact: so long as they don’t disturb the Ilmataran habitat, they’re free to conduct their missions in peace.But when Henri Kerlerec, media personality and reckless adventurer, ends up sliced open by curious Ilmatarans, tensions between Terran and Sholen erupt, leading to a diplomatic disaster that threatens to escalate to war.Against the backdrop of deep-sea guerrilla conflict, a new age of human exploration begins as alien cultures collide. Both sides seek the aid of the newly enlightened Ilmatarans. But what this struggle means for the natives—and the future of human exploration—is anything but certain, in A Darkling Sea by James Cambias.