Welcome to Ringworld, an intermediate step between Dyson Spheres and planets. The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping. Larry Niven's novel, Ringworld, is the winner of the 1970 Hugo Award for Best Novel, the 1970 Nebula Award for Best Novel, and the 1972 Ditmars, an Australian award for Best International Science Fiction.

It's been centuries since the robots of Panga gained self-awareness and laid down their tools; centuries since they wandered, en masse, into the wilderness, never to be seen again; centuries since they faded into myth and urban legend. One day, the life of a tea monk is upended by the arrival of a robot, there to honor the old promise of checking in. The robot cannot go back until the question of "what do people need?" is answered. But the answer to that question depends on who you ask, and how.

Ambassador Mahit Dzmare arrives in the center of the multi-system Teixcalaanli Empire only to discover that her predecessor, the previous ambassador from their small but fiercely independent mining station, has died. But no one will admit that his death wasn't an accident - or that Mahit might be next to die, during a time of political instability in the highest echelons of the imperial court. Now, Mahit must discover who is behind the murder, rescue herself, and save her station from Teixcalaan's unceasing expansion.

The starship Starfarer is poised for our first voyage to another star system. The Alien Contact Team - physicist Victoria Fraser MacKenzie, geneticist Stephen Thomas Gregory, geographer Satoshi Lono, and alien contact specialist J.D. Sauvage - and the rest of the faculty and staff prepare for humanity's most ambitious exploratory expedition. But the world has changed. A new regime orders the vessel to be abandoned. It will be turned into an instrument of war. What do the Starfarers do? They do what any red-blooded Alien Contact Team would do. They steal the starship.

The imperious Winter colonists have ruled the planet Tiamat for 150 years, deriving wealth from the slaughter of the sea mers. But soon the galactic stargate will close, isolating Tiamat, and the 150-year reign of the Summer primitives will begin. All is not lost if Arienrhod, the ageless, corrupt Snow Queen, can destroy destiny with an act of genocide. Arienrhod is not without competition as Moon, a young Summer-tribe sibyl, and the nemesis of the Snow Queen, battles to break a conspiracy that spans space.

Vannemar Morgan's dream is to link Earth to the stars with the greatest engineering feat of all time: a 24,000-mile-high space elevator. But first he must solve a million technical, political, and economic problems while allaying the wrath of God. For the only possible site on the planet for Morgans Orbital Tower is the monastery atop the Sacred Mountain of Sri Kanda.

Marra never wanted to be a hero. As the shy, convent-raised, third-born daughter, she escaped the traditional fate of princesses, to be married away for the sake of an uncaring throne. But her sister wasn’t so fortunate—and after years of silence, Marra is done watching her suffer at the hands of a powerful and abusive prince. Seeking help for her rescue mission, Marra is offered the tools she needs, but only if she can complete three seemingly impossible tasks:

Floyd Jones has always been able to see exactly one year into his future, a gift and curse that began one year before he was even born. As a fortuneteller at a post-apocalyptic carnival, Jones is a powerful force, and may be able to free society from its paralyzing Relativism. If, that is, he can avoid the radioactively unstable government hit man on his tail.

Idris has neither aged nor slept since they remade him in the war. And one of humanity's heroes now scrapes by on a freelance salvage vessel, to avoid the attention of greater powers. After Earth was destroyed, mankind created a fighting elite to save their species, enhanced humans such as Idris. In the silence of space they could communicate, mind-to-mind, with the enemy. Then their alien aggressors, the Architects, simply disappeared - and Idris and his kind became obsolete. Now, 50 years later, Idris and his crew have discovered something strange abandoned in space.

Adrian Tchaikovksy's critically acclaimed stand-alone novel Children of Time is the epic story of humanity's battle for survival on a terraformed planet. Who will inherit this new Earth? The last remnants of the human race left a dying Earth, desperate to find a new home among the stars. Following in the footsteps of their ancestors, they discover the greatest treasure of the past age - a world terraformed and prepared for human life. But all is not right in this new Eden.

To the Apaches, Daniella Blackwood was an adopted daughter, respected and cherished. To their shaman, the bold white streak in her hair made her special and her visions in the flames make her a woman of magic. Yet no magic could protect Daniella from the passion that sears her senses when she first meets Travis Colton.

This is the way the world ends...for the last time. It starts with the great red rift across the heart of the world's sole continent, spewing ash that blots out the sun. It starts with death, with a murdered son and a missing daughter. It starts with betrayal, and long dormant wounds rising up to fester. This is the Stillness, a land long familiar with catastrophe, where the power of the earth is wielded as a weapon. And where there is no mercy.

When the Chosen One dies seconds from victory, the future falls into the hands of his younger sister. Disabled since childhood, Elenor never expected to be thrust into the center of a vast political web, but now her choices threaten to unravel it. As she navigates treacherous strands of deception, Elenor must forge alliances, confront sadistic family members, and uncover mysteries that span centuries. The world teeters on the brink of chaos, magic spirals out of control, and ancient forces move in the shadows hungry for vengeance.

This lush novel, set in 1766 England and America, evokes an era ripe with riot and revolution, from the teeming streets of London to the sprawling grounds of a Virginia plantation. Mack McAsh burns with the desire to escape his life of slavery in Scottish coal mines while Lizzie Hallim is desperate to shed a life of sheltered subjugation to her spineless husband. United in America, their only chance for freedom lies beyond the Western frontier - if they're brave enough to take it.

Helene Wecker's dazzling debut novel tells the story of two supernatural creatures who appear mysteriously in 1899 New York. Chava is a golem, a creature made of clay, brought to life by a strange man who dabbles in dark Kabbalistic magic. When her master dies at sea on the voyage from Poland, she is unmoored and adrift as the ship arrives in New York Harbor. Ahmad is a jinni, a being of fire, born in the ancient Syrian Desert. Trapped in an old copper flask by a Bedouin wizard centuries ago, he is released accidentally by a tinsmith in a Lower Manhattan shop.

Kyra is the youngest Markswoman in the Order of Kali, a highly trained sisterhood of elite warriors armed with telepathic blades. Guided by a strict code of conduct, Kyra and the other Orders are sworn to protect the people of Asiana. But to be a Markswoman, an acolyte must repudiate her former life completely. Kyra has pledged to do so, yet she secretly harbors a fierce desire to avenge her dead family. When Kyra's beloved mentor dies in mysterious circumstances, and Tamsyn, the dangerous Mistress of Mental Arts, assumes control, Kyra is forced on the run.

Change or die: the only options available on the Durallium Company-owned planet GP. The planet's deadly virus had killed most of the original colonists - and changed the rest irrevocably. Centuries after the colony had lost touch with the rest of humanity, the Company returned to exploit GP, and its forces found themselves fighting for their lives. Afraid of spreading the virus, the Company had left its remaining employees in place, afraid and isolated from the natives.

Elfreda Raughn will avoid pregnancy if it kills her, and one way or another, it will kill her. Though she's able to stomach the gruesome day-to-day duties, the reality of preserving the Order's magical bloodline horrifies her, but the Sisters of Aytrium have sworn to pay a price for the safety of their nation. Elfreda wants out, whatever the cost. So when a shadowy cabal approaches her with an offer of escape, she leaps at the opportunity. As their spy, she gains access to the highest reaches of the Order....

Gen was a bard's apprentice, his nimble hands meant for the lute and his voice for a song. Then the half-mad and completely bored Shadan Khairn invaded Gen's village to winter there and start a war. He shoved a sword in Gen's hands and tormented his body, shaping a bard into a warrior to be killed for sport. As the days of torture pile up like the snow, Gen searches for death. But the day is at hand when the shattered shards of the world will knit together again, and the world's slain god will be reborn.

Surrounded by old folks and even older artifacts at an auction, high school English teacher Shannon Parker never expects to find something that shocks her down to her very core: an ancient vase, complete with a beautiful painting of a goddess that looks just like her. And just as she's stealing away with her seriously suspicious purchase, she's magically thrown into the world of Partholon, where not only has she taken the place of Rhiannon, Goddess Incarnate and Epona's Chosen, but she's due to be married to a surly (but oh-so-handsome) High Shaman centaur, ClanFintan.

Two hundred years after the Forbidding was broken, Santhenar is locked in war with the lyrinx - intelligent, winged predators who will do anything to gain their own world. Despite the development of battle clankers and mastery of the crystals that power them, humanity is losing. Tiaan, a lonely crystal worker in a clanker manufactory, is experimenting with an entirely new kind of crystal when she begins to have extraordinary visions.

A bonus never-before-released short story by best-selling author Isobelle Carmody. Before the apocolyptic Great White - and the regressive theology that ruled the decimated population in its wake - the city of Uropa is a gleaming metropolis devoted wholly to materialistic consumption.

After her daughter is kidnapped, Emmeline Highclere—a thirty-four-year-old mother living in isolation with memories and grief her only companion—must do everything in her limited power and divine abilities to get the girl back. Emmeline believes her daughter, Elora, is the Beloved—the conduit with goddess-granted divine abilities prophesied to bring peace to the Three Kingdoms. Because the last person thought to be the Beloved was brutally murdered by the enemy kingdom of Folterra, Emmeline has dedicated the last sixteen years to hiding her daughter and keeping her safe.

Everyone dreams of marrying a prince - except for me. I am nothing more than a pawn in my adoptive mother's diabolical plot against the seven kingdoms. I was the chosen tool, her sharpened blade that would cut the deepest into the heart of the kingdom of Baist. But like all deadly weapons, my wedding is two-edged sword that could cost me my soul. For I am Rosalie, one of the adopted daughters of Lady Eville, and it is my duty to enter into a loveless and hate-filled marriage with the narcissistic Crown Prince of Baist.

The Red Swords came with the sunrise and took everything Shawna Llewan held dear. Her family massacred, her home destroyed, she escapes with nothing but her mother’s heirloom and the desire for vengeance. When she’s found by Dormael, a Warlock of the Conclave, she learns that her mother’s keepsake - the very reason her family was killed - holds the power to unleash boundless destruction.

An epic tale of evil and rescue, betrayal and love, and a terrorist threat unlike anything the human race has ever known.

Lovely Sorcha is the seventh child and only daughter of Lord Colum of Sevenwaters. Bereft of a mother, she is comforted by her six brothers who love and protect her. Sorcha is the light in their lives and they are determined that she know only contentment. But Sorcha's joy is shattered when her father is bewitched by his new wife, an evil enchantress who binds her brothers with a terrible spell, a spell which only Sorcha can lift - by staying silent.

Most of the time the Moontide Bridge lies deep below the sea, but every 12 years the tides sink and the bridge is revealed, its gates open for trade. The Magi are hell-bent on ruling this new world, and for the last two Moontides they have led armies across the bridge on "crusades of conquest". Now, the third Moontide is almost here, and this time the people of the East are ready for a fight... but it is three seemingly ordinary people that will decide the fate of the world.

Once there were three worlds, each with their own human species. Then, fleeing out of the void came a fourth species, the Charon. Desperate, on the edge of extinction, they changed the balance between the worlds forever. Karan, a sensitive with a troubled heritage, is forced to steal an ancient relic in repayment of a debt. It turns out to be the Mirror of Aachan, a twisted, deceitful thing that remembers everything it has ever seen.

With a ragged peace in place, demons burn farmlands, violent Reivers roam the wilds and plague has spread beyond the Black Meadows. The country is on its knees. In a society that fears and shuns him, Aranok is the first magically-skilled draoidh to be named King's Envoy. Now, charged with restoring an exiled foreign queen to her throne, he leads a group of strangers across the ravaged country. But at every step, a new mystery complicates their mission.

For nearly a billion years, every known sentient species in the universe has been the result of genetic and cultural guidance - or "uplifting" - by a previously uplifted patron race. Then humans are discovered. Having already uplifted chimps and dolphins, humanity clearly qualifies as an intelligent species, but did they actually evolve their own intelligence, or did some mysterious patron race begin the process, then suddenly abandon Earth?

When the first warm breeze of Doomsday came wafting over the Shenandoah Valley, the Sumners were ready. Using their enormous wealth, the family had forged an isolated post holocaust citadel. Their descendants would have everything they needed to raise food and do the scientific research necessary for survival. But the family was soon plagued by sterility, and the creation of clones offered the only answer.

Vannemar Morgan's dream is to link Earth to the stars with the greatest engineering feat of all time: a 24,000-mile-high space elevator. But first he must solve a million technical, political, and economic problems while allaying the wrath of God. For the only possible site on the planet for Morgans Orbital Tower is the monastery atop the Sacred Mountain of Sri Kanda.

When prospector Bob Broadhead went out to Gateway on the Heechee spacecraft, he decided he would know which was the right mission to make him his fortune. Three missions later, now famous and permanently rich, Robinette Broadhead has to face what happened to him and what he is...in a journey into himself as perilous and even more horrifying than the nightmare trip through the interstellar void that he drove himself to take!

Whether he’s underwriting for an overlord, or wearing a pocket protector in a pocket universe, Tom Stranger has just one policy: providing Quality Customer Service. No alien menace is too menacing, no galactic rift too rifty for the multiverse’s most-trusted Interdimensional Insurance Agent in these three brand-new adventures and two classic escapades.

It is the late 21st century, and due to the economic breakdown and rising crime rate, nearly every citizen has fled Toronto. The city is a slum, populated by the homeless, the poor, and criminals like Rudy, who uses the power of voodoo to help him control the booming drug market. But also left behind are people like Ti-Jeanne, who hope to use voodoo to help rebuild the city, even as Canada's privileged population turns to Toronto to begin harvesting human organs.

Welcome to Ringworld, an intermediate step between Dyson Spheres and planets. The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping. Larry Niven's novel, Ringworld, is the winner of the 1970 Hugo Award for Best Novel, the 1970 Nebula Award for Best Novel, and the 1972 Ditmars, an Australian award for Best International Science Fiction.

Enter the city of Hart's Hope, ruled by gods both powerful and indifferent, riddled with sorcery and revenge. The city was captured by a rebellious lord, Palicrovol, who overthrew the cruel king, Nasilee, hated by his people. Palicrovol, too, was cruel, as befitted a king. He took the true mantle of kinghood by forcing Asineth, now Queen by her father's death, to marry him, raping her to consummate the marriage.

Father Ruiz-Sanchez is a dedicated man - a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics...until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief. Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn.

Three remarkable journeys into the stars: Worlds of Exile and Illusion includes Rocannon's World, Planet of Exile, and City of Illusions. These three spacefaring adventures mark the beginning of grand master Ursula K. Le Guin’s remarkable career. Set in the same universe as Le Guin’s groundbreaking classics The Left Hand of Darkness and The Dispossessed, these first three books of the celebrated Hainish series follow travelers of many worlds and civilizations in the depths of space.

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.