Historical fiction. Another side of WW II that I needed to be reminded of, the medical experimenting on women in concentration camps. Needed to set the book down at points as the thought of human experimentation was hard to justify, how Caroline Ferriday worked tirelessly for her standards was amazing! Loved how the author interwove the lives of three women, one in NYC, one in Poland and one in Germany. The author‘s 1st novel, what next!