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.

Babel-17, winner of the Nebula Award for best novel of the year, is a fascinating tale of a famous poet bent on deciphering a secret language that is the key to the enemy's deadly force, a task that requires she travel with a splendidly improbable crew to the site of the next attack.

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.

The Shadow of the Torturer is the first volume in the four-volume epic, the tale of a young Severian, an apprentice to the Guild of Torturers on the world called Urth, exiled for committing the ultimate sin of his profession - showing mercy towards his victim.

Gene Wolfe's "The Book of the New Sun" is one of speculative fiction's most-honored series. In a 1998 poll, Locus Magazine rated the series behind only "The Lord of the Rings" and The Hobbit as the greatest fantasy work of all time.

The planet Athshe was a paradise whose people were blessed with a mystical awareness of existence. Then the conquerors arrived and began to rape, enslave, and kill humans with a flicker of humanity. The athseans were unskilled in the ways of war, and without weapons. But the gentle tribesmen possessed strange powers over their dreams. And the alien conquerors had taught them how to hate....

Stories of Your Life and Others presents characters who must confront sudden change-the inevitable rise of automatons or the appearance of aliens-while striving to maintain some sense of normalcy. In the amazing and much-lauded title story (the basis for the 2016 movie Arrival), a grieving mother copes with divorce and the death of her daughter by drawing on her knowledge of alien languages and non-linear memory recollection.

The Mote In God's Eye is their acknowledged masterpiece, an epic novel of mankind's first encounter with alien life that transcends the genre. No lesser an authority than Robert A. Heinlein called it "possibly the finest science fiction novel I have ever read".

Charlie Gordon knows that he isn't very bright. At 32, he mops floors in a bakery and earns just enough to get by. Three evenings a week, he studies at a center for mentally challenged adults. But all of this is about to change for Charlie. As part of a daring experiment, doctors are going to perform surgery on Charlie's brain. They hope the operation and special medication will increase his intelligence, just as it has for the laboratory mouse, Algernon.

In a world devastated by nuclear war with humanity on the edge of extinction, aliens finally make contact. They rescue those humans they can, keeping most survivors in suspended animation while the aliens begin the slow process of rehabilitating the planet. When Lilith Iyapo is "awakened", she finds that she has been chosen to revive her fellow humans in small groups by first preparing them to meet the utterly terrifying aliens, then training them to survive on the wilderness that the planet has become. But the aliens cannot help humanity without altering it forever.

In this definitive novel, listeners will follow Thrawn's rise to power - uncovering the events that created one of the most iconic villains in Star Wars history.

Roshar is a world of stone and storms. Uncanny tempests of incredible power sweep across the rocky terrain so frequently that they have shaped ecology and civilization alike. Animals hide in shells, trees pull in branches, and grass retracts into the soilless ground. Cities are built only where the topography offers shelter. It has been centuries since the fall of the 10 consecrated orders known as the Knights Radiant, but their Shardblades and Shardplate remain: mystical swords and suits of armor.

A catastrophic event renders the earth a ticking time bomb. In a feverish race against the inevitable, nations around the globe band together to devise an ambitious plan to ensure the survival of humanity far beyond our atmosphere, in outer space.

The Ministry for the Future is a masterpiece of the imagination, using fictional eyewitness accounts to tell the story of how climate change will affect us all. Its setting is not a desolate, post-apocalyptic world, but a future that is almost upon us - and in which we might just overcome the extraordinary challenges we face.

From a New York Times best-selling and Hugo award-winning author comes a modern masterwork of science fiction, introducing a captain, his crew, and a detective as they unravel a horrifying solar system wide conspiracy that begins with a single missing girl. Humanity has colonized the solar system - Mars, the Moon, the Asteroid Belt and beyond - but the stars are still out of our reach. Jim Holden is XO of an ice miner making runs from the rings of Saturn to the mining stations of the Belt. 

Thirty years ago, Wilde was found as a boy living feral in the woods, with no memory of his past. Now an adult, he still doesn't know where he comes from, and another child has gone missing. No one seems to take Naomi Pine's disappearance seriously, not even her father - with one exception. Hester Crimstein, a television criminal attorney, knows through her grandson that Naomi was relentlessly bullied at school. Hester asks Wilde - with whom she shares a tragic connection - to use his unique skills to help find Naomi.