@aety Anything by Greg Egan, I would start with any short story collection, or, if you are not into short stories, "Permutation City".
Less 'hard', but always brilliant, Ted Chiang.
If you want to read the hardest reification of the phrase 'Fully Automated Luxury Space Communism' grab the "Culture" series by Ian M Banks. Just _don't_ start with "Use of Weapons".
And a side recommendation for the "Steerswomen" series by Rosemary Kirstein. More relevant than you'll initially think.