MixedThe Wall Street JournalMs. Bennetts, a writer for Vanity Fair, is appalled by Rivers’s self-denigration and, even more, by her 'fat shaming,' as we now call Rivers’s type of cutting humor. Far too much of the biography is given over to this theme ... For a far more textured sense of her work ethic, I’d recommend the 2010 documentary Joan Rivers: A Piece of Work, which features Rivers hauling her own bag into chain hotels and hanging out in dingy changing rooms. This moving film also reveals a more empathetic, generous-hearted woman.