The story of Katharina and Martin Luther engages the reader because most of the plot is true. There’s much to learn as well as enjoy in this book. The life of nuns tortured and died during this time revealed a darkness I didn’t know much about. I rated the book PG 16 with a strong warning of references to rape, brutal torture and a dark time for the Catholic Church. I still recommend it as must read. Its passion for husband and wife is well written without being understated or enhanced. Seeing Katharina’s world and recalling the dear cost to those who brought the reformation of Christianity is priceless.