An Eye for an Eye: The Untold Story of Jewish Revenge Against Germans in 1945 is a 1993 book by John Sack, in which Sack states that some Jews in Eastern Europe took revenge on their former captors while overseeing over 1,000 concentration camps in Poland for German civilians. Sack provides details of the imprisonment of 200,000 Germans "many of them starved, beaten and tortured" and estimates that "more than 60,000 died at the hands of a largely Jewish-run security organisation." Source: Wikipedia (en)