>>12618151Heinleins other works (Starship Troopers and Stranger in a Strange Land in particular) are all fantastic.
Rendevouz with Rama is excellent and very hard Sci-Fi.
Ringworld is another must-read sci fi classic.
Neuromancer is more cyberpunk than Sci-Fi, but it has a lot of /sfg/ shenanigans in it anyways. It's also another "must read" kind of sci fi just because so much other sci fi copied it.
Ben Bova has some decently hard sci fi/near future sci fi with a lot of /sfg/ autism in them.
Forever War is excellent, seen some other anons recommend that.
Honestly there is a ton of really good sci fi out there, probably more than any other fiction genre.
