She was a resistance fighter in World War II and survived imprisonment at the Auschwitz and Ravensbrück concentration camps. Her autobiographical account of the Holocaust in occupied Poland Passenger from Cabin 45 became the basis for her 1962 novel Passenger, subsequently translated into 15 languages.[2] The original radio drama was adapted for an award-winning feature film, while the novel was adapted into an opera by the same title with music by Mieczysław Weinberg.[3]