Angels have soared through Western culture and consciousness from Biblical to contemporary times. But what do we really know about these celestial beings? Where do they come from, what are they made of, how do they communicate and perceive? The celebrated essayist Eliot Weinberger has mined and deconstructed, resurrected and distilled centuries of theology into an awe-inspiring exploration of the heavenly host.        From a litany of angelic voices, Weinberger’s lyric