As a reserved book-worm (I am a book reviewer aren't I?), I was eager to read this book. Written with precise detail and flowing stories, this book is rather engaging. While it seems to be a gargantuan book, it's really not that long (the "notes" section takes up a sizable chunk of pages). Each chapter begins with a fun quote. While this book gets scientific at times, readers do not need to be psychology experts to follow the author--things are well explained, and terms are defined. The book talks about various types of relationships and environments, from workplaces to marriages to child-rearing and more. I like how personal profiles are given in the chapters. This way, readers can understand more about how introversion plays out in the real life. So, everyone has something they can learn from this book. Contrary to popular belief, this is not just a self-help book for introverts. Extroverts can learn much from this book. What I liked in this book also was the few quizzes it had to determine your own level of introversion / extroversion and other psychological / behavioral characteristics. I also enjoyed how Cain dispelled some myths, from erroneous introversion myths to erroneous portrayals of the introverted Moses in major motion pictures. There is even added bonus material in the back of the book, which I won't spoil. For those who want to look up specific things, an index is included as well.