After providing a clear, succinct background to events, Goldsworthy's tactic is to weave the two stories into a single thread by moving seamlessly back and forth from Rome to Egypt. It works beautifully. His mastery of the sources is commendable, his historical judgement sure-footed and, as ever, he brings a winning lucidity to the description of often quite complex situations - the perfect accompaniment to any, especially Mediterranean, holiday Peter Jones The Tablet