A really well written, proper literary fiction mystery thriller

Hello, fellow book lovers. I'd love some suggestions of mystery thrillers that are nicely written. I'm looking for a page turner with unguessable endings and turns.

I'm not really well-versed in the genre. I read Birnam Wood by Eleanor Catton and absolutely loved it. I read In The Woods by Tana French, and hate it, because I thought it was poorly written.

Thank you!