Anyone with an analytical/rational mindset will probably love both, even if you're normally not into fiction.
Don't expect to be able to discuss it with anyone that hasn't read it - or something like it - though.
I started reading the Eternal Golden Braid after, which was really good but dense, and for some light fantasy The Name of the Wind was an overall impressive book.
The Martian and, recently, Project Hail Mary, are written in a completely different style but manage to hit many of the same buttons.
While not really intended as rational fiction, Threadbare was a nice read too if you enjoy litRPG.
[1] https://www.fanfiction.net/s/10360716/1/The-Metropolitan-Man [2] https://alexanderwales.com/the-dark-wizard-of-donkerk-chapte...
Their wiki also suggests lots of other books and authors. https://www.reddit.com/r/rational/wiki/
Also I'm already following way too many serials, that's inconvenient.
Sadly Hpmor didn’t click with me though. I liked the science but found the characters themselves undeveloped. Acting rationally is great and all, but with rational people have feelings too and that felt completely missing. I just couldn’t get far into the story sadly.
What's more, since this is a well written story, there are good reasons why the character is so off-putting (to some) at the start. It is definitely NOT a case of the author espousing some limited view of elite rationalists as unemotional arrogant know-it-alls.
All the main characters do reveal rich emotional lives as the story progresses.
It's well worth the read. (I've read every book discussed in this thread, and HPMoR is my definite favorite.)
It initially started with a quote like:
>as a big fan of Harry Potter
So I was under the impression they may've believed the post was talking about the regular Harry Potter series and recommending something based on Harry Potter rather than HPMOR.