Frankenstein. Superb science fiction, very readable even though written 200 years ago. And Wuthering Heights, which strangely like Frankenstein, has a complex narrative structure and an unhinged, obsessive central character

I read it this year too. I was surprised by the amount of heartfelt soliloquising the monster did, he was much more compelling than I expected. Victor of course was the real monster in the story, self obsessed, not taking responsibility for his actions, I found myself actively rooting against him.