Between 1940 and 1945 over 100,000 Jews were deported from the Netherlands and murdered (three quarters of the Dutch-Jewish population). One of these was Sientje Abram, an eleven year-old girl from Amsterdam who was killed at Auschwitz in 1942. Guus Luijters first came across Sientje's name when he was writing a book about the 18,000 Dutch children murdered during the German Occupation. But he could find out nothing about her. All those...