Synthesizes several different approaches to personality theory without getting overly deep into the psychology. Generally a good, critical look at how American culture emphasizes extroverted traits. I would recommend this book to anyone: to extroverts, so they can have better personal and professional relationships with introverts; and to introverts, to better understand their own strengths and weaknesses. This book doesn't quite cross the line into truly amazing territory, but it is the best pop-psych book on the subject at the moment. Many more will surely follow.