Post-Humanity in space

Hi all,
for an interesting take of post humanity in space, read Bruce Sterling's

novel SCHISMATRIX.
There are two big factions: Shapers (genetically enhanced) and Mechanist

(prosthetic gerontocracy), some older colonies orbiting the Moon, now in

decline, and several other (very odd) splinter groups.
The question echoing in the background is: "what is human and what is no

longer human?".

Have fun :-)

Ciao,
Matteo