If you are serious about becoming a leader in a problem-solving environment this book will give you some very important insights. Something you might feel, but can't quite put the finger on.
It's a short book, but the material is high-density. Questions after each chapter are perhaps as important as the chapters themselves. The way the book is structured, you can treat it like a course material. In fact, it requires action on your part.
I'd sum up the book using the concepts from one of the last chapters:
Leaders are graded not by adding all the qualities together, but by multiplying. For example: 20% interpersonal skills * 80% technical = 16% total, not 100% and not 50%.