The Dies committee for the investigation of Un-American activities supplies the substance on which this book is constructed. Two years intensive investigation of the satellite organizations that pay tribute in word, deed, and money, to Stalin in Moscow; less extensive findings regarding Nazi and Fascist organizations; all resulting in making one feel, on finishing the book, that our ground is riddled with subversive plantings and that every bush hides an agent of totalitarianism. Some of the organizations that provide ""front"" for Communistic activities and propaganda are:- International Labor defense, American League for Peace and Democracy, American Youth Congress, the Transport Workers' Union, American League against War and Fascism, Workers' Alliance -- and more openly, the Communist Party, the German-American Bund, the Sons of Italy and the Silver Legions. Individuals such as Browder, Curran, Bridges and others come in for attack, and names too numerous to mention in literature, art, labor, social welfare and politics do not escape the scalpel. A passionate and not very objective book, a marshalling of unadulterated facts, with no attempt at cases nor dramatic presentation, this is almost wholly a book for reference, and not for the average reader.