Mackenzie King was Prime Minister of Canada from 1921-30 and from 1935-48. Few public figures in any country have left a larger mass of diaries and private papers, but none are more difficult to understand. The reason is King's strange inner life. He saw himself as an instrument of God's will, believed in communication with the dead, reacted to signs and portents, and withal was extraordinarily domineering and self-centered. The author has done a skillful job of explaining how King integrated the inner and outer sides of his life; the mystery remains: how did his associates endure him?