Professor Du Boulay’s book is both a highly readable introduction to Langland’s work and an original contribution to the history of religious thought. It rejects the view that Langland was primarily a political radical or a prophet of doom and sees him as both a great imaginative poet and a preacher of Christian charity. Writing in an age of intellectual subtlety and shifting social frontiers, Langland expressed deep anxieties yet offered to his fellow-Christians a way of interior repentance and practical love, guided by the enigmatic figure of Piers.