4.0

Good collection of information about introversion vs extroversion and what relates to and causes these traits. Informative and, at times, riveting.

I was very disappointed that the book spent so much time on non-science/non-research material. It has sections that would best be described as self-help/parenting advice. The writing is quite adequate, but not interesting/exciting/humorous/etc. It simply does what it needs to do. These qualities removed a star from my review.