In the spring of A.D. 587, John Moschos and his pupil Sophronius the Sophist embarked on a remarkable expedition across the entire Byzantine world, traveling from the shores of Bosphorus to the sand dunes of Egypt. Using Moschos's writings as his guide and inspiration, the acclaimed travel writer William Dalrymple retraces the footsteps of these two monks, providing along the way a moving elegy to the slowly dying civilization of Eastern Christianity and to the people who are struggling to keep its flame alive. The result is Dalrymple's unsurpassed masterpiece: a beautifully written travelogue, at once rich and scholarly, moving and courageous, overflowing with vivid characters and hugely topical insights into the history, spirituality and the fractured politics of the Middle East.