I saw the movie first, then read the first book - I'm just a little backward

I enjoyed both the movie and first book very much. Got through the second book in about 5 weeks. I started the third book a few days ago. I'm looking forward to seeing "Catching Fire" during the holidays next year.
Interesting that I don't believe I have found any cursing/swearing/foul language in any of the books. I believe the original target audience for the trilogy was teenagers...maybe that is why.