 In 1934 he described the ascent of the Nazis in his novel "Die braune Pest" (The Brown Plague).In 1959 he published a book about counterfeiting art, entitled "Kunst der Fälscher - Fälscher der Kunst.3000 Jahre Betrug mit Antiquitäten" (translated in English as "The Art of the Faker - 3,000 Years of Deception").