Sci-fi-y I've mostly spent time with space opera stuff so recommendations are more focused that way...
Asimov is a classic as well. Foundation series and (outside of that series) The End of Eternity.
Broken Earth for a not-space-opera and more rock focused series.
Not beginner-y, Imperial Radch is really interesting.
Neal Stephenson can be hit or miss for folks. My favorite is Seveneves but Snow Crash is a classic and Cryptonomicon fits well with crypto folks.
Now I remember reading A Hitchhiker's Guide back in the early 80s. It was very popular with my crowd. I honestly don't remember too much about it, but I seem to recall it was kind of funny in an ironic way? I might be mistaken.
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Thanks. This is what I was looking for.
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