I think Edgar Allan Poe invented the detective story with Murders in the Rue Morgue.
I can’t remember the detective’s name except his last name was Dupin.
I think I might have heard that. I’ve seen the 1932 movie, of course, but it supposedly has little to do with the Poe story. Bela Lugosi as the villain and Leon Ames the hero.
There was a lot of serialized fiction stories in those late-1800s newspaper supplements, but I suppose most is lost to time, unless the author was famous enough to have his work re-collected in hardback. I have some original, turn-of-the-century “dime novels,” but they don’t make for very interesting reading. At least, compared to the pulps that followed in the 1920s/30s.