There ups and downs in our our. It's a human nature. Billy's book tells a lot about how a child can grow so fast under hard circumstances, how Kate (his mother) become a strong woman.
Billy here is not only tells about her mother, but also his root and how his ancestors' struggle to be in their right now live. If you notice, here I use the word "struggle" because I do sincerely admire Kate and her family surviving skill. I especially moved when Kate faced with her family's sudden death one by one. So, if you think your life is hard enough, I recommend you to read this book.
Indeed, in a way Kate's Story reminds me a lot of Malika Oufkir's story.