Robot series is good, Foundation series by him is brilliant. Also check out The Culture novels by Iain M Banks (he was the closest recent author to be a great

Robot series is good, Foundation series by him is brilliant. Also check out The Culture novels by Iain M Banks (he was the closest recent author to be a great the equal of Wells, Huxley or Orwell (imo) just a phenomenal writer). The Polity series by Neal Asher are well imagined and he world builds brilliantly.