Very recently unfortunately I've only read scientific literature, but overall from what I read I strongly recommend "The Portrait of Dorian Gray" by Oscar Wilde - it has some characters with quite a distinct and provocative way of thinking, but you need to take it with a grain of salt.
Also "Crime and Punishment" by Dostoievski if you're a bit older because the best thing about the book in my opinion is the psychological depth of the protagonist and how Dostoievski prints some nuances of the human nature.


Added a contribution to the first post that I think people that usually spar/parkour/engage in high-matchframe games in multiplayer should check out.