The Hunger Games: Catching Fire. I love how Katniss never lost her morality; even though she saw the most explicable things in the arena--TWICE. She witnessed horrible things and never lost her humanity.
I love how the first four are all horrible monster muttations and then there's just Peeta. Because they've turned Peeta into a muttation that has just as much as not more of a horrible effect on Katniss as the others do. It just makes me so sad.
"My nightmares are usually about losing you. I’m okay once I realize you’re here." ― Peeta, The Hunger Games: Catching Fire (I can't remember if they put this in the movie or not but it is still wonderful.