'A brilliant, disturbing book...her most adventurous, imaginative experiment. She allows her didactic, satirical ideas about our civilization memorable expression.' TLS 'Doris Lessing breaks through the semantic barrier into speculative areas of psychic geography like some returned traveller, drawing new, real maps. She is alert to more of the crucial questions than most of us and, by describing their contours so exactly, comes nearer to the slow progress towards solution.' Observer