Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A pretty useless book

If you are a student of quantum mechanics (for the first time) you will learn nothing from this book. It does not contain anything of practical value. If you are interested in philosophy, or an amateur of science, this book is for you. If you are an experienced physicist, this book is pretty useless. How can one talk about histories without using the path integral? You are better off reading Feynman, Kleinert, Thirring and other authors who do understand quantum field theory deeply.