Greg Egan's Perihelion Summer is a story of people struggling to adapt to a suddenly alien environment, and the friendships and alliances they forge as they try to find their way in a world where the old maps have lost their meaning.Taraxippus is coming: a black hole one tenth the mass of the sun is about to enter the solar system.Matt and his friends are taking no chances. They board a mobile aquaculture rig, the Mandjet, self-sustaining in food, power and fresh wat...

Sleep and the Soul contains ten stories from Hugo Award-winning author Greg Egan.• "You and Whose Army?"• "This Is Not the Way Home"• "Zeitgeber"• "Crisis Actors"• "Sleep and the Soul"• "After Zero"• "Dream Factory"• "Light Up the Clouds"• "Night Running"• "Solidity"

"Instantiation" is a collection of eleven science fiction stories by Hugo Award winning author Greg Egan:• "The Discrete Charm of the Turing Machine"• "Zero For Conduct"• "Uncanny Valley"• "Seventh Sight"• "The Nearest"• "Shadow Flock"• "Bit Players"• "Break My Fall"• "3-adica"• "The Slipway"• "Instantiation"

Welcome to the strangest world in science fictionSeth is a surveyor, along with his friend Theo, a leech-like creature running through his skull who tells Seth what lies to his left and right. Theo, in turn, relies on Seth for mobility, and for ordinary vision looking forwards and backwards. Like everyone else in their world, they are symbionts, depending on each other to survive.In the universe containing Seth's world, light cannot travel in all directions: there is a "dar...

When electronics importer Cara Leon goes missing, private investigator Sam Mujrif is hired by her sister to investigate. Cara is eight times taller than Sam, but evidence soon points to players much smaller than either of them. As Sam and his cross-scale colleagues pursue the case, it becomes apparent that Cara's disappearance is linked to the development of technology with the potential to reshape their whole society, and radically alter the balance of power between the scales.

In a world where the cells that make up our bodies are not committed to any one organism, Marla is confronted by the fickleness of her cytes, and resolves to understand them with help from Ada, a centuries-old Flourisher. Swappers like Ruth embrace fluidity, and meet with others to exchange cytes, seeking the perfect mix. But Ruth faces her own crisis, and as the technology to manipulate cytes advances, all three are drawn into a struggle to shape the future of life.

Del lives in a world of many skies: by passing through the Hoops embedded in the ground, her people can walk freely between land that lies beneath a new set of constellations for every circuit they make around the edge of a Hoop.When archaeologists find a copy of the famed Book of All Skies, Del takes delivery of the manuscript in her role as conservator at the Museum of Apasa, hoping it will shed light on the fate of the Tolleans, the ancient civilisation that produced it. But whe...

Phoresis and Other Journeys contains three novellas from Hugo Award-winning author Greg Egan.• "The Four Thousand, the Eight Hundred": civil war in an asteroid colony sees refugees fleeing, by any means possible.• "Dispersion": a world where all life is divided into six cyclically invisible and intangible groups faces a terrifying new disease.• "Phoresis": the inhabitants of a double planet embark on an epic, multi-generational project to cross between the twin worlds...

From the award-winning author Greg Egan comes a Tor.com Original sci-fi short story, "Zeitgeber"For millions of years, life on Earth has taken its cues from the rising and setting of the sun, and for most of human history we've followed the same rhythm. But if that shared connection was broken, and we each fell under the sway of our own private clock, could we still hold our lives together? One family is about to find out.At the Publisher's request, this ti...

Houston, we have a problem...Life is fragile. The difference between success and failure can come down to nothing – the thread of a screw, the flick of a switch – and when it goes wrong, you fix it... or someone dies.Mission Critical takes us from our world, across the Solar System, and out into deep space to tell the stories of people who had to do the impossible. And do it fast.Featuring stories by Peter F. Hamilton, Yoon Ha Lee, ...

Immortality, but at what price, in what form, and how could you be you? Find out in Greg Egan's "Uncanny Valley," a Tor.com Original short storyIn the near future it’s possible to build a new you, a better you, one that could carry on forever. But if you could carry on, if you could make choices about who you would be forever, how much of your past would you bring with you? Would you be tempted to maybe…edit? Adam isn’t all that he used to be, but he wants to be.

When a detective, a new mother, is assigned to the case of a horrific triple murder, it appears to be a self-contained domestic tragedy, a terrible event but something that doesn’t affect the rest of the community. But it slowly becomes clear that something much darker may be at play, something that spreads out from the scene of the crime to corrode the closest relationships of everyone it touches, in Greg Egan's The Nearest, a Tor.com Original.At the Publisher's request, ...