Look, if we’re talking romance where the end of the world is as much a character as the leads, 'The Road' by Cormac McCarthy won’t cut it—way too bleak. I keep circling back to how K.A. Tucker wrote 'The Simple Wild', and yeah, that's not post-apocalyptic, but it shows she gets survivalist isolation. For actual collapse, try 'Last Light' by Claire Kent. It’s set after a solar flare kills tech, and the romance between the two survivors feels earned, gritty, and desperate in a way that doesn’t feel like window dressing. The focus on securing clean water and shelter isn't just a backdrop; it directly shapes their trust and intimacy.
Sometimes these books lose the plot by having a perfectly functional farm appear out of nowhere. What I liked about 'Last Light' was the constant low-grade fear that felt real. The sequel shifts to different couples in the same world, which worked less for me—I got attached. I’ve seen 'Moonshine' by Kat Bostick recommended a lot in these threads, but haven't cracked it yet. Someone said it has a 'grumpy/sunshine' dynamic but with actual starvation stakes, which could be good or could be annoying depending on execution.