In 1931, after a visit to Berlin, Lewis published his book Hitler (1931), which presented Adolf Hitler as a "man of peace" whose party-members were threatened by communist street violence.
V roce 1931 po návštěvě Berlína vydal Lewis knihu Hitler (1931), ve které prezentoval Adolfa Hitlera jako muže míru, jehož sympatizanti byli ohroženi komunistickým násilím z ulice.