What are the best fictional books you’ve ever read?

I started reading last year, mostly productivity stuff, but now I’m really looking to jump into fiction to unwind after a long week of uni, studying, and work. I need something to help me relax during the weekends without feeling like I’m working.

I’d love some recommendations for books that are short enough to finish in a day but still hit hard and are totally worth it. No specific genre preferences right now. I'm open to whatever. Looking forward to seeing what you guys suggest. Thank you very much in advance.