This was an excellently written fictional book based on actual historical events and individuals. BThe main characters, Connie and her sister, Dottie, are based on real life heroines, Ida and Louise Cook, who helped many Jews escape Germany, Austria, and Poland before WWII. The story that author Rachel Wesson wove so expertly, blending real life events with fictional embellishments to keep the reader's attention, brings to life the struggles that those living in Europe during the 30s were facing, particularly those who were Jewish. Without giving away much of the story I'll say that the young ladies, Connie and Dottie, use their love of opera to travel throughout Europe and return home with items from those wishing to escape with their families so that they could sell the items and open bank accounts for the owners so that they could then prove that they had assets in Britain in order to obtain British visas to leave the countries being overtaken by the Nazis. What the women did saved many people which, according to Jewish Talmudic scripture, means they saved the whole world. They have been recognized by Yad Vashem, The World Holocaust Remembrance Center, as two of The Righteous Among Nations, those non-Jews who at great risk to themselves saved Jews during the Holocaust. The story tells well the indignities, injustices, terror, brutality, and suffering the Jews faced and their willingness to risk all to flee all they knew for a chance for freedom and their very lives. The author also does a very good job showing the attitudes not only of all those amazing individuals who offered to help, even at a risk of their own freedom and possibly their lives, but also of the ordinary citizens who turned a blind eye to the atrocities taking place or, worse yet, joined in the hatred. This story and others about Holocaust rescuers are particularly meaningful to me because my husband's great grandparents and great aunt are among the over six million who are not was lucky as those these women helped. They instead died in concentration camps. Just yesterday, before finishing this book, I went to the Zekelman Holocaust Center in Farmington Hills, Michigan, and reading this story made each photo of the many Jewish victims even more poignant. This truly was an incredible book and I feel very blessed to have received an advanced reader copy of the book from the publisher through Netgalley.