Leisha Camden was genetically modified at birth to require no sleep, and her normal twin Alice is the control. Problems and envy between the sisters mirror those in the larger world, as society struggles to adjust to a growing pool of people who not only have 30 percent more time to work and study than normal humans, but are also highly intelligent and in perfect health. The Sleepless gradually outgrow their welcome on Earth, and their children escape to an orbiting space station to set up their own society. But Leisha and a few others remain behind, preaching acceptance for all humans, Sleepless and Sleeper alike. With the conspiracy and revenge that unwinds, the world needs a little preaching on tolerance.

    She had no memory of how she died. That was also new; before, when she had awakened as a new clone, her first memory was of how she died.Maria's vat was in the front of six vats, each one holding the clone of a crew member of the starship Dormire, each clone waiting for its previous incarnation to die so it could awaken. And Maria wasn't the only one to die recently...

    His goal is to facilitate Winter's inclusion in a growing intergalactic civilization. But to do so he must bridge the gulf between his own views and those of the completely dissimilar culture that he encounters.Embracing the aspects of psychology, society, and human emotion on an alien world, The Left Hand of Darkness stands as a landmark achievement in the annals of intellectual science fiction.

    The ensuing climate cataclysm will soon render the earth inhospitable for humanity, as the last such meteorite did for the dinosaurs. This looming threat calls for a radically accelerated effort to colonize space, and requires a much larger share of humanity to take part in the process.Elma York’s experience as a WASP pilot and mathematician earns her a place in the International Aerospace Coalition’s attempts to put man on the moon, as a calculator. But with so many skilled and experienced women pilots and scientists involved with the program, it doesn’t take long before Elma begins to wonder why they can’t go into space, too.Elma’s drive to become the first Lady Astronaut is so strong that even the most dearly held conventions of society may not stand a chance against her.

    A planet promising to reveal the truth about our place in the cosmos, untainted by overpopulation, pollution, and war. Ren believed in that vision enough to give up everything to follow Suh-Mi into the unknown. More than twenty-two years have passed since Ren and the rest of the faithful braved the starry abyss and established a colony at the base of an enigmatic alien structure where Suh-Mi has since resided, alone. All that time, Ren has worked hard as the colony's 3-D printer engineer, creating the tools necessary for human survival in an alien environment, and harboring a devastating secret.Ren continues to perpetuate the lie forming the foundation of the colony for the good of her fellow colonists, despite the personal cost. Then a stranger appears, far too young to have been part of the first planetfall, a man who bears a remarkable resemblance to Suh-Mi. The truth Ren has concealed since planetfall can no longer be hidden. And its revelation might tear the colony apart…

    Humanity, which has spread throughout the universe, is involved in a war with the Invaders, who have been covertly assassinating officials and sabotaging spaceships. The only clues humanity has to go on are strange alien messages that have been intercepted in space. Poet and linguist Rydra Wong is determined to understand the language and stop the alien threat. (Paul Goat Allen)

    When famous adventurer Sir Richard Francis Burton dies, the last thing he expects to do is awaken naked on a foreign planet along the shores of a seemingly endless river. But that's where Burton and billions of other humans (plus a few nonhumans) find themselves as the epic Riverworld saga begins. It seems that all of Earthly humanity has been resurrected on the planet, each with an indestructible container that provides three meals a day, cigarettes, alcoholic beverages, a lighter, and the odd tube of lipstick. But why? And by whom? That's what Burton and a handful of fellow adventurers are determined to discover as they construct a boat and set out in search of the river's source, thought to be millions of miles away. Although there are many hardships during the journey--including an encounter with the infamous Hermann Goring--Burton's resolve to complete his quest is strengthened by a visit from the Mysterious Stranger, a being who claims to be a renegade within the very group that created the Riverworld. The stranger tells Burton that he must make it to the river's headwaters, along with a dozen others the Stranger has selected, to help stop an evil experiment at the end of which humanity will simply be allowed to die. --Craig E. Engler

    They kept the Target under intense surveillance for decades, letting the public believe they were exploring the solar system, while they worked feverishly to refine the technology needed to reach it. The ship itself remained silent, drifting. Dr. Jane Holloway is content documenting nearly-extinct languages and had never contemplated becoming an astronaut. But when NASA recruits her to join a team of military scientists for an expedition to the Target, it’s an adventure she can’t refuse. The ship isn’t vacant, as they presumed. A disembodied voice rumbles inside Jane’s head, "You are home." Jane fights the growing doubts of her colleagues as she attempts to decipher what the alien wants from her. As the derelict ship devolves into chaos and the crew gets cut off from their escape route, Jane must decide if she can trust the alien’s help to survive.

    While United Nations diplomats endlessly debate a possible first contact mission, the Society of Jesus quietly organizes an eight-person scientific expedition of its own. What the Jesuits find is a world so beyond comprehension that it will lead them to question what it means to be "human".

    It's the beginning of an incredible odyssey in which John Carter, a gentleman from Virginia and a Civil War veteran, unexpectedly finds himself on to the red planet, scene of continuing combat among rival tribes. Captured by a band of six-limbed, green-skinned savage giants called Tharks, Carter soon is accorded all the honor of a chieftain after it's discovered that his muscles, accustomed to Earth's greater gravity, now give him a decided advantage in strength. And when his captors take as prisoner Dejah Thoris, the lovely human-looking princess of the city of Helium, Carter must call upon every ounce of strength, courage, and ingenuity to rescue her-before Dejah becomes the slave of the depraved Thark leader, Tal Hajus!Excerpt:Her oval face was beautiful in the extreme, her every feature finely chisled and exquisite, her eyes large and lustrous and her head surmounted by a mass of coal black, waving hair, caught loosely into a strange yet becoming coiffure. Similar in face and figure to women of Earth, she was nevertheless a true Martian--and prisoner of the fierce green giants who held me captive, as well!

    Together this dynamic pair begin their journey through space aided by quotes from The Hitch Hiker's Guide "A towel is about the most massively useful thing an interstellar hitchhiker can have" and a galaxy-full of fellow travellers: Zaphod Beeblebrox - the two-headed, three-armed ex-hippie and totally out to lunch president of the galaxy; Trillian, Zaphod's girlfriend (formally Tricia McMillan), whom Arthur tried to pick up at a cocktail party once upon a time zone; Marvin, a paranoid, brilliant and chronically depressed robot; Veet Voojagig, a former graduate student who is obsessed with the disappearance of all the ball-point pens he has bought over the years.

    Exploratory teams are accompanied by Company-supplied security androids, for their own safety.But in a society where contracts are awarded to the lowest bidder, safety isn’t a primary concern.On a distant planet, a team of scientists are conducting surface tests, shadowed by their Company-supplied ‘droid — a self-aware SecUnit that has hacked its own governor module, and refers to itself (though never out loud) as “Murderbot.” Scornful of humans, all it really wants is to be left alone long enough to figure out who it is.But when a neighboring mission goes dark, it's up to the scientists and their Murderbot to get to the truth.

    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.

    Maybe it will kill you when the per diem for your allotted food, water, and air runs out, just before you hit paydirt. Maybe it will kill you when you are trapped between the reigning corporations-the Five Dragons-in a foolish gamble against a futuristic feudal society. On the Moon, you must fight for every inch you want to gain. And that is just what Adriana Corta did. As the leader of the Moon's newest "dragon," Adriana has wrested control of the Moon's Helium-3 industry from the Mackenzie Metal corporation and fought to earn her family's new status. Now, in the twilight of her life, Adriana finds her corporation-Corta Helio-confronted by the many enemies she made during her meteoric rise. If the Corta family is to survive, Adriana's five children must defend their mother's empire from her many enemies... and each other.

    Now one scientist, Dan Sylveste, will stop at nothing to solve the Amarantin riddle before ancient history repeats itself. With no other resources at his disposal, Sylveste forges a dangerous alliance with the cyborg crew of the starship Nostalgia for Infinity. But as he closes in on the secret, a killer closes in on him. Because the Amarantin were destroyed for a reason — and if that reason is uncovered, the universe—and reality itself — could be irrecoverably altered….