Green Angel by Alice Hoffman
Green is on her own, the world is ash around her and her family is gone.
This apocalyptic story engrosses my readers (12+). The girls especially like it. While it is a slim book it gives the reader a lot to think about. Because it is a slim book more are willing to try it.
I once I read this review on Goodreads I realized that I could never do a better job of explaining the nuance of this book.