I must admit I'm no slouch at work and a firm believer that hard work means success.
Basically, this book is just that. If your an introvert then this book will be ideal to break you out of your shell. However, if you already an extrovert then this book may not be for you. It's all about team skills, motivation, confidence etc etc.
Yes, some introverts do have great brains, but this isn't about being a professor of something. This is a book on success in the work place.
It kind of builds self esteem and awareness of your surroundings. But, it is not a book that will suddenly allow you to be a adonis at work. I gave this book to a colleague who I feel is an introvert and just plain shy. This book did nothing for her, she said it was interesting, but she lacks confidence and no book can build your confidence, but you need to dive in and be that person. I think people who have multple personalities are the best people. As there personalities adapt to any situation.
So, to conclude this book is okay, but dont expect it to give you spuer confidence, you either have confidence or you need to build it up gradually. It doesn't happen over night.
Remember confidence is key....