What would I do without Nat

I started reading The Lost Symbol by Dan Brown last night. I told Nat that I was thinking of watching the movie Angels and Demons, which is based on a previous Dan Brown book, because it's been referenced, and I want to know whats going on.
Nat was like, OK, but didn't you read Angels and Demons already.
Bottom line, I don't have to to watch Angels and Demons before I get into the new book