I have just started reading The Hunger Games. I am about half way through the first book and, I must say, I am really enjoying it.
What they have shown from the film so far is right on the money and this ET featurette shows them filming some of the scenes. Some spoilers are in there.
It also has interviews with the likes of Jennifer Lawrence, Woody Harrelson, Lenny Kravitz and Elizabeth Banks where they talk about the film and the book.
Source: Bleeding Cool