Ego and Archetype: Individuation and the Religious Function of the Psyche by Edward F. Edinger
If you've heard C. G. Jung's ideas are good for you, but you're put off by the sheer volume of his work, try looking at him through this marvelous lens provided by the late Dr. Edward Edinger. He takes Jung's ubiquitous concept of individuation and shows how it works in the individual and society. Edinger believed that the encounter with the self is modern equivalent of what might have in the past been called the discovery of God. This is one of those books that was head-rearranging for people of a certain generation (it first came out in the 1970s)-and it's lost none of its power to do that.