Tau Zero

Thousands of years ago, Earth’s terraforming program took to the stars. On the world they called Nod, scientists discovered alien life - but it was their mission to overwrite it with the memory of Earth. Then humanity’s great empire fell, and the program’s decisions were lost to time. Aeons later, humanity and its new spider allies detected fragmentary radio signals between the stars. They dispatched an exploration vessel, hoping to find cousins from old Earth. But those ancient terraformers woke something on Nod better left undisturbed. And it’s been waiting for them.

When an experiment to study quantum uncertainty goes spectacularly wrong, physics student Bill Rustad and his friends find that they have accidentally created an inter-dimensional portal. They connect to Outland - an alternate Earth with identical geology, but where humans never evolved. The group races to establish control of the portal before the government, the military, or evildoers can take it away. Then everything changes when the Yellowstone supervolcano erupts in an explosion large enough to destroy civilization and kill half the planet.

Bob Johansson has just sold his software company and is looking forward to a life of leisure. There are places to go, books to read, and movies to watch. So it's a little unfair when he gets himself killed crossing the street. Bob wakes up a century later to find that corpsicles have been declared to be without rights, and he is now the property of the state. He has been uploaded into computer hardware and is slated to be the controlling AI in an interstellar probe looking for habitable planets.

For 12,000 years the Galactic Empire has ruled supreme. Now it is dying. But only Hari Sheldon, creator of the revolutionary science of psychohistory, can see into the future, to a dark age of ignorance, barbarism, and warfare that will last 30,000 years. To preserve knowledge and save mankind, Seldon gathers the best minds in the Empire, both scientists and scholars, and brings them to a bleak planet at the edge of the Galaxy to serve as a beacon of hope for a fututre generations.

This is the way the world ends...for the last time. It starts with the great red rift across the heart of the world, 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.

Being a sentient spaceship really should be more fun. But after spreading out through space for almost a century, Bob and his clones just can't stay out of trouble. They've created enough colonies so humanity shouldn't go extinct. But political squabbles have a bad habit of dying hard, and the Brazilian probes are still trying to take out the competition. And the Bobs have picked a fight with an older, more powerful species with a large appetite and a short temper.

Bob Johansson didn't believe in an afterlife, so waking up after being killed in a car accident was a shock. To add to the surprise, he is now a sentient computer and the controlling intelligence for a Von Neumann probe.

The Moon will soon return. Whether this heralds the destruction of humankind or something worse will depend on two women. Essun has inherited the phenomenal power of Alabaster Tenring. With it, she hopes to find her daughter, Nassun, and forge a world in which every outcast child can grow up safe. For Nassun, her mother's mastery of the Obelisk Gate comes too late. She has seen the evil of the world and accepted what her mother won't: that sometimes what is corrupt cannot be cleansed, only destroyed.

At first, only a few things are known about the celestial object that astronomers dub Rama. It is huge, weighing more than ten trillion tons. And it is hurtling through the solar system at inconceivable speed. Then a space probe confirms the unthinkable: Rama is no natural object. It is, incredibly, an interstellar spacecraft. Space explorers and planet-bound scientists alike prepare for mankind's first encounter with alien intelligence.

Winner of the 2017 Hugo Award for Best Novel. Sequel to the multi-award nominated The Fifth Season. The season of endings grows darker, as civilisation fades into the long cold night. Essun has found shelter, but not her missing daughter. Instead there is Alabaster Tenring, destroyer of the world, with a request only Essun can grant. The Broken Earth trilogy begins with The Fifth Season, continues in The Obelisk Gate and concludes with The Stone Sky.

The fate of the Foundation rests on young Arcadia Darell, only 14 years old and burdened with a terrible secret. As its scientists gird for a final showdown with the Mule, the survivors of the First Foundation begin their desperate search. They too want the Second Foundation destroyed, before it destroys them.

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 initial Martian pioneers had fierce disagreements about how the planet should be used by humans. This led to a war that threatened the lives of billions of people on both Mars and Earth. Now, the second generation of settlers continues the struggle to survive the hostile yet strangely beautiful environment of the red planet.

The once red and barren terrain of Mars is now green and rich with life - plant, animal, and human. But idyllic Mars is in a state of political upheaval, plagued by violent conflict between those who would keep the planet green and those who want to return it to a desert world.

The galaxy has seen great empires rise and fall. Planets have shattered and been remade. Amongst the ruins of alien civilisations, building our own from the rubble, humanity still thrives. And there are vast fortunes to be made, if you know where to find them.... Captain Rackamore and his crew do.