One of the best book available on the 16 personality types as indicated by the Myers-Briggs and Keirsey personality tests. Several page description of the psychodynamics of each type, with a quiz for determine one's type and discussion of the four primary types, personality types in children and more.
The actual temperament test (you know, ESFJ, INTP, etc) and how to interperet your results
The authors are trainers of therapists and fdiagnosticians of dysfunctional behavior at California State University
This is one of the original books on the Myers-Briggs Type Inventory (MBTI). Easy to read and interesting to find out "what you are" in a kind of personality test that doesn't need a psychologist to figure out.
Book about the Keirsey Temperament Sorter, includes the test, so you can determine your temperament.
Clearly written. Accessible. The included test is briefer and clearer than the Meyers-Briggs.