It is always exciting to read the retelling of a familiar narrative, whether it is of the early life of Shakespeare, the political careers of Washington and Jefferson, or the story of the development of the classic Christian understanding of the person of Jesus Christ during the first seven or eight centuries of Christianity. In this last case, the reader feels liberated from the weight of inherited pieties, invited to look again at the existing documentation with fresh eyes, urged to reconceive what he imagines to be the implied agenda of the main actors, and their significance for the later history of Christian faith. Christopher Beeley's new book from Yale certainly has this effect on those trained by earlier tellings of the story of early Christology, from Newman to Harnack and Loofs, to Sellers and Grillmeier and Kelly. The heroes and villains, characteristic phrases and defining moments of heresy and orthodoxy, all take on a slightly new form in Christopher's reconstruction – a form centred on the question of how the personal and ontological unity of the Saviour is conceived and emphasised by key Christian authors and principal church synods from the third to the eighth centuries.