Books with unraveling mystery/thriller through dialogues, like the movie “The Man From Earth”

The Man From Earth is a movie that takes place in just one room with a few friends talking. One of them makes a claim he cannot prove, others cannot disprove him. Their dialogues reveals more and more of the claim which keeps the movie interesting

Are there books which are thriller/mystery but just through dialogues, no guns, not fights, no action, small list of characters. I prefer books published before 2023, adult category