"Light" reading for me is children's books!
Odd Duck by Cecil Castellucci is classified as a graphic novel at my library. I know I've mentioned how awesome graphic novels are, and I love seeing lots of graphic novels coming out now for the preschool/early-elementary crowds. Odd Duck is hilarity with a moral - be yourself. This is the perfect book to start a discussion on fitting in (or not).
Disclaimer: Yes, I've linked to where you can learn more about these books and authors. No, I'm not making money off the links.