For newer science fiction, I really enjoyed “The Unincorporated Man.” I’m going to start Dune after I finish “Tragedy and Hope.”
Newer stuff?
David Weber...pretty much anything by him including the Honor Harrington series and its spin offs, the Safehold series (one of my favorites), Empire of man series, and so on...
John Ringo’s “Black Tide Rising” series fascinated me some how, I’m not sure why. I would definitely recommend it to anyone interested in post apocalyptic fiction. His Posleen War series was also very good, though some of the spin-offs got a bit tedious. His Council Wars series was definitely a different spin on a forced return to pre-industrial age society, and lastly his “Paladin of Shadows” series quite rightly sparked the “Oh John Ringo, No!” meme a few years ago, but I still liked them ;)