Definitely worth to read once in your life (Actually as soon as possible). If you are interested in human Behaviors, decision-making process in mind (to know what's going on there), this book is highly recommended.
The thing I liked about the book Is That It Does not just give you the "the procedure" of the human-Behaviors, it is not the just what the author Observed, aim it Gives you very deep analytical opinions derived from Those observations.