A book you love but wouldn't recommend

Hullo!
I just finished The Faerie Hounds of York by Arden Powell, which I loved so damn much, but it got me thinking that I wouldn’t necessarily recommend it to people without knowing their tastes first.

It’s a dark, melancholic, and incredibly beautiful book, but it’s also kind of scary, gloomy, doesn’t have an HEA, and, I don’t know, it just feels… a bit weird (in the best way). To be honest ,it kind of felt like the literary embodiment of Lana Del Rey and Hozier songs.

I really feel like it’s not a book that can be enjoyed by most people, despite being so well written(imo).

So my question is: is there a book that you absolutely love but wouldn’t recommend, and why?