Newton's Wake
by Ken MacLeod

Description:
In the aftermath of the Hard Rapture--a cataclysmic war sparked by the explosive evolution of Earth's artificial intelligences into godlike beings--a few remnants of humanity managed to survive. Some even prospered.

Lucinda Carlyle, head of an ambitious clan of galactic entrepreneurs, had carved out a profitable niche for herself and her kin by taking control of the Skein, a chain of interplanetary star-gates left behind by the posthumans. But on a world called Eurydice, a remote planet at the farthest rim of the galaxy, Lucinda stumbled upon a forgotten relic of the past that could threaten her way of life.