Give Mike a break, he's just a college boy. He'll become less and less talkative.
What makes this book so unique, is the development of character, incredible knowledge of human nature and portrayal of subtleties in it and in the processes of human mind.
I can write endless hymns to every line, every phrase in the main storyline, but I believe that with time you'll come to appreciate such things yourselves. Of course it's impossible on the first reading, who doubts.
As to someone's being hostile, I can't see where you got that. I feel the intercourse within the family to be portrayed with much more warmth and autenticity in the book than in the movie.
Read on!