Lilac Girls by Martha Hall Kelly is a fabulous 5⭐️ read about three main characters. Kasia, a Polish prisoner in a concentration camp during WWII who was horribly experimented on by Herta, a German aspiring surgeon. And Caroline, an American who continues to send aid to French orphans and during the war and raises money for the Polish women who were experimented on. Heart felt elements of friendship and family love.