My impression of this book seems to improve with age. Susan Cain presents a new perspective in introversion and its place in society. The book seems aimed at parents and teachers, but has enough information of general interest and value to be a good read for anyone interested in these aspects of psychology or sociology.
The book presents the strengths and weaknesses of both introversion and extroversion and why both are of value to society. I found the section on leadership styles and strengths and weaknesses very interesting. Susan continues to touch on why corporate America overvalues the extrovert and the value to business of the introvert and on the relationship between the two personality styles.
More of the book was directed more toward parents and teachers dealing with introverted children than I liked, or I would have rated the book much better. These sections were still interesting, but much less relevant.
This book is a good read for anyone, but it could have been better.