This book wasn’t good. It was amazing. It broke my heart so many times over and over again. Parts were really, really hard to read. It takes place during WWII with the Holocaust and tells the (intersecting) stories of three women: Caroline Ferriday (a real person), a socialite based in New York who advocated for a group of survivors called The Rabbits (they were the subject of terrifying experimental operations), Kasia Kuzmerick (a Polish teenager sent to Ravensbrück, the Nazi concentration camp for women), and Herta Oberheuser (also a real person – a young doctor working at Ravensbrück). It was deeply upsetting but so beautifully written. I can’t recommend it enough.