yeah the book was basically all internal monologue and that was a huge aspect the movie didn't have which made Snow come off as a lot more likeable and also took away some interesting character development. In the book it's clear from the very beginning he's a self serving asshole but that's not as clear in the movie.Like the movie kinda depicts Snow and Sejanus as "best friends" but in the book Snow spends so much time talking about how much he hates the guy and only tolerates him because of his money lol.