The Faces of Janus is a book by A. James Gregor, in which Gregor asserts that there are fundamental errors in Marxist analyses of fascism. He argues that the political spectrum identifying the Left as progressive and the Right as reactionary was (in the words of Franklin Hugh Adler) a dishonest way of "privileging purported movements of the Left and demonizing movements of the Right". However, Adler also criticises Gregor, saying of the book: "The tone is often shrill, the style bombastic, the claims exaggerated; in short, vintage Gregor."