Dichronauts - Greg Egan

"Dichronauts" est le dernier roman SF de Greg Egan. Moi qui aime vraiment l'auteur et ses folles extrapolations scientifiques trouve qu'ici il est allé trop loin, qu'il s'est trop amusé avec son monde mathématique et a oublié de le peupler vraiment. Une erreur qu'il n'avait pas faite dans la trilogie Orthogonal.

Je ne peux en dire plus car ma chronique sera dans le Bifrost n° 88, et elle ne reviendra ici qu’un an après la sortie de la revue (c’est à dire, pfff…).

Je peux au moins donner le résumé de la couv’ car celui-ci est disponible partout :

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.

Voila. Rien de plus. Sinon voici ce qui m'attend :