By Ursula K. Le Guin, I really like The dispossed and The left hand of darkness, and The Wind's Twelve Quarters (espcially the underground mathematicians measuring the distance to the face of God [the sun], one).
Edit:
::: spoiler Spoilers
Although saying "minimum" was a bit evil when all of the systems had exactly 1 solution (not necessarily in ℕ^2),
I wonder if it's puzzle trickiness, anti-LLM (and unfortunate non comp-sci souls) trickiness or if the puzzle was maybe scaled down from a version where there are more solutions.
:::
I remember being quite ticked off by her takes about free will, and specifically severly misrepresenting compatibilism and calling philosphers stupid for coming up with the idea.
By Ursula K. Le Guin, I really like The dispossed and The left hand of darkness, and The Wind's Twelve Quarters (espcially the underground mathematicians measuring the distance to the face of God [the sun], one).