Release Date: July 2, 2017
eISBN: Dichronauts


by Greg Egan

Seth 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 “dark cone” to the north and south. Seth can only face to the east (or the west, if he tips his head backwards). If he starts to turn to the north or south, his body stretches out across the landscape, and to rotate as far as north-north-east is every bit as impossible as accelerating to the speed of light.

Every living thing in Seth’s world is in a state of perpetual migration as they follow the sun’s shifting orbit and the narrow habitable zone it creates. Cities are being constantly disassembled at one edge and rebuilt at the other, with surveyors mapping safe routes ahead.

But when Seth and Theo join an expedition to the edge of the habitable zone, they discover a terrifying threat: a fissure in the surface of the world, so deep and wide that no one can perceive its limits. As the habitable zone continues to move, the migration will soon be blocked by this unbridgeable void, and the expedition has only one option to save its city from annihilation: descend into the unknown.

Buy eBook:

eBook purchase options:
About the author Greg Egan

Greg Egan is the author of the acclaimed SF novels Diaspora, Quarantine, Permutation City, and Teranesia. He has won the Hugo Award as well as the John W. Campbell Memorial Award. His short fiction has been published in a variety of places, including Interzone, Asimov’s, and Nature. Egan holds a BSc in Mathematics from the University of Western Australia, and currently lives in Perth.

View Profile

Books by Greg Egan

Other books that could interest you

Stories Of The Raksura: The Falling World & The Tale Of Indigo And Cloud
Eclipse 2
The Best Horror of the Year Volume 1
The Croning
Collected Fantasies of Clark Ashton Smith Volume 4
The Collected Fiction of William Hope Hodgson: The Ghost Pirates & Other Revenants of The Sea
After The Saucers Landed
Polity Agent
The Constantine Affliction
Arrows Of Time
The Fire In His Hands