Wool trilogy by Hugh Howey, good Fallout-esque vault living saga
Osiris Project series by EJ Swift was excellent. Left a lot unexplained which made a refreshing change
Didnt click with the 3 body stuff, might need another go. Found Becky Chambers a bit simplistic
Currently enjoying Children of Ruin by Adrian Tchaikovsky
Loads of classics available on Kindle via the SF Masterworks collection, now finally includes Asimov’s Foundation Trilogy