Well researched historical fiction

In the 1930's, nineteen year old Cussy Carter and her father live in the isolated hilly woods of Troublesome Cree, Kentucky. They are they last "blue people" of Kentucky, a rare genetic anomaly, and endure racism and prejudice because of the blue color of their skin. They are considered "colored." They scrabble out a tough living with dad working in coal mines and Cussy taking a job with the unique, government funded Pack Horse Library project. This book is interesting and fairly well written. I appreciated the research that clearly went into it's creation and found the genetic anomaly of the blue skinned people of Kentucky to be fascinating. It was a little frustrating that it seemed like Cussy was never able to stand up for herself, but I guess that was the case for many women and minorities of her time. I was waiting for her antagonizers and oppressors to be put in their place and I sadly never had the satisfaction. Overall, I still enjoyed the book.