Excellent scholarship, of its kind—narrow in topic and analytic ambit, but factually comprehensive and interpretively transparent. Russell lays out a substantial swathe of philosophical, Jewish, and Christian thought in order to reach what he clearly sees as its summit in Maximus the Confessor's doctrine of deification. Along the way, every step gets a clear explication, complete with detailed discussions of vocabulary and sourcing. It's not quite broad enough temporally for a dictionary, but for the relevant fathers this is an ideal reference work. I still wanted a bit more of an argument, but that's just my own style of scholarship talking really.