Alice Herz-Sommer was born in 1903 in Prague, the Prague of the Hapsburgs and of Franz Kafka, a family friend. Musically very gifted, by her mid-teens Alice was one of the best-known pianists in Prague. But as the Nazis swept across Europe her comfortable, bourgeois world began to crumble around her, as anti-Jewish feeling not only intensified but was legitimised. In 1942, Alice's mother was deported. Desperately unhappy, she resolved to learn Chopin's 24 Etudes - the most technically demanding piano pieces she knew - and the complex but beautiful music saved her sanity. A year later, she,...