To Kill a Mockingbird fits the theme perfectly. Here's a link to a pdf file.
https://docs.google.com/viewer?a=v&pid=sites&srcid=YW5udXJpc2xhbWljc2Nob29sLm9yZ3xzaXN0ZXIta2F0ZWx5b...
I'm not I was yesterday tho
She was a former slave who helped many other slaves escape from plantations in the south and helped them escape to the north. She also was a spy during the civil war in the mid 1800’s