This gets five stars for Marie-Louise von Franz, James Hillman's contribution to Jungian typology are practically irrelevant in my opinion.

Von Franz does an exquisite job of delineating the inferior function in each type, how it fits within Jung's model of the psyche, its role in adult psychological growth, and useful methods on how patients can access their inferior function.

She illuminates her arguments via case histories, mythological analogy, and anecdotal observations. This is hardly a rock-solid foundation for fact, but to hell with the facts--modern science has yet to outstrip the usefulness of the Jungians' anecdotal insights, despite "Psychological Types" nearing its centennial. I would be more skeptical if I hadn't observed and applied these principles for myself, but the laboratory that is life continues to vindicate these findings.