Pedln, I know that the music is still in my piano bench (no, I can't play it, my husband bought it). I love it. "The Third Man" was originally a story by Graham Greene, first appearing in Ellery Queen's Mystery Magazine where I read it before the movie came out. Recently, I both reread the novella and rewatched the movie. Both are very good, the movie better than the book. They're different, though. In the novella, the American Holly Martins gets the girl, at least for a while, with no long-term promises.
I also read the Cornell Woolrich story on which "Rear Window" was based when it first came out in EQMM, and in this case I think the story was better, but I haven't reread it to match rewatching the movie.
To complete the books part, I recently read C. S. Forester's "The African Queen" for the first time. Again, similar but not the same. The movie is really good, worth watching a number of times. The book isn't as good, though it has some interesting seamanship not in the movie.