I finished The Twenty Days of Turin. While at its heart it's a metaphor about the post WW2 years in Italy, it can be easily read with no historical knowledge. Very atmospheric and unsettling.
It's basically about a man who wants to write a book about the twenty days of mass psychosis/insomnia punctuated by gruesome murders that took place in Turin ten years back and that nearly no one wants to talk about. What he unearths from various witnesses is very creepy (this is where the fantastic part kicks in) and not as over as he had thought. The air of the city itself gets more and more oppressive and heavy and the protagonist starts having one strange encounter after another, while the final chapter downright feels like a fever dream, in and out of the story.