alt Hacker NewsGreg Egan writes novels with plots that revolve around high-end science, physics and mathematics with some very wild concepts and conclusions. Even better, he has animations and illustrations of some of his books' concepts on his website for those that want to go deeper.
I hadn't noticed his Miscellaneous Fiction section, so this is a nice rabbit hole to find.
I had not read much of him before but I read Permutation City last year and it's one of the most thought provoking (and upsetting) books I've read in a long time, can't recommend it enough.