William C. Jeffries

William C. Jeffries is the author of "True to Type," a book that appears to focus on the Myers-Briggs Type Indicator (MBTI).

While specific details about the author are not provided in the given information, it can be inferred that Jeffries has knowledge and expertise in personality typing, particularly the MBTI system.

The book seems to serve as a comprehensive guide or reference for those interested in understanding the MBTI, offering explanations and insights into various personality types.

Jeffries' work, though potentially dated in some aspects, continues to be read and discussed by those interested in personality psychology and self-discovery through personality assessments.