yzing human nature in mark twain's "A Connecticut Yankee in King Arthur's Court"?

I am doing a research paper and i am trying to find some books that yze A Connecticut Yankee in King Arthur's Court by Mark Twain. I would prefer to have something about human nature if possible and i already have one book. It is called: Mark Twain’s Ethical Realism: The Aesthetics of race, cl, and gender.