Introversion voima

This is a rather American book. Since the book is written for people living in the extroverted American society, large parts of it sound rather foreign to someone living in Finland, which is mentioned in the book as introvert heaven (which it to some extent is, and to some extent is not quite as much as the book claims).

The book also heavily leans on MBTI, which to my understanding is just entertainment, not much above horoscopes, and certainly not evidence-based science. That's a bit of a minus.

That said, especially if you are an American introvert and feel like you're not how you're supposed to be, not extrovert enough, this book will be helpful and help you understand yourself better. If you are an introvert and well in touch with your nature, there's little new in this book – but perhaps there's an extrovert in your life who could use some guidance on how to live with an introvert.