This book was extremely insightful. Cain had wonderful advice for introverts on how to function in this extroverted society. She also addressed extroverts, telling them things that would make the introverts in their lives much happier.
As great as this book was, it began to get dry about two-thirds of the way through and I struggled to finish it. If you end up struggling like I did; hang in there. You don't want to miss some of those last chapters.
All in all, I highly recommend this book to every introvert out there. Use it to gain a better of understanding of who you are and that it's okay that you're that way. I also recommend this book to extroverts. Whether you know it or not, there is an introvert in your life. Make their lives just a little bit better by reading this book and understanding what they need.