Roll of Thunder, Hear My Cry
Cassie is our girl and also the first-person narrator of Roll of Thunder, Hear My Cry. She's only nine years old, and we totally see the limitations of being such a young narrator: the adult characters aren't too quick to let her in on the action. But Taylor gets around this by having her hear things second-hand—whether by accident, or by purposefully eavesdropping.
Despite the eavesdropping, Cassie's a nice girl. We root for her as she learns some hard lessons about growing up in the racially charged South in the 1930s.