Witness, first published in May 1952, is a best-selling book of memoirs by American writer Whittaker Chambers (1901–1961), which recounts his life as a dedicated Marxist-communist ideologist in the 1920s, his work in the Soviet underground during the 1930s, and his 1948 testimony before the US Congress, which led to a criminal indictment against Alger Hiss and two trials in 1949. Source: Wikipedia (en)