Some people compare holden caufield to huckleberry finn.
I think there are some similiatries between the two such as they both run from life and conventional society. Holden realized that adults had to let children fall down and make mistakes. Perhaps you can find this useful. Catcher in the Rye is my all-time favorite book. I don't know if it'll help anymore, but if you e-mail me back, i can send you some ideas you can use for theme.