What is the author's tone in the memoir, Negroland?

The book focuses on the trials and triumphs faced by the writer along with those of her family and friends. While it seems it would have been easy for her to focus more on the negative, she tries not fall into that trap, and even addresses that near the end of the book. This gives an overall tone of inspiration, hope, and fulfillment, even though the author faced trials and dealt with fears.