The book starts with description of quantum probabilities which is a central concept of this subject. Very vivid explanation of every topic. Feynman's path integrals is elegant, simple and powerful method to depict and understand particle interaction with field. This book will make you familiar with all this essential stuffs.
I am none to comment on the content of the book. Wonderful and insightful appreoach to quantum mechanics. I felt I have started to understand quantum mechanics after reading this book. Amazon's delivery and the product was good.