Wow! I'd urge you to include "Ruby" by Cynthia Bond. It's brutal but beautiful. I'd consider "The Immortal Life of Henrietta Lacks" too.
Thavolia Glymph, Out of the House of Bondage: The Transformation of the Plantation Household (2008)
A good book on relations between black slaves/white mistresses, and the particular type of violence done by white women. Read this in a graduate history seminar last semester and it was one of the favorites! Very clear writing, a compelling argument, and a good intervention in Southern race/gender histories.