Blink is not your average book. It concerns the fact that some people are able to recognize certain things in split milliseconds. For example, in the book the author mentions a peculiar aspect of a seasoned tennis coach, able to recognize double faults before they even happened.
However, when asked, the coach had absolutely no idea how he did that. It is this unconscious thinking that has caused this book to be made. Other peculiarities discussed include instantly knowing when an important statue is fake or not, how people can choose one drink over another differently based on HOW MUCH they drank, and how better advertisement can make food products taste better.
The important point of this book is for people to realize our true thinking capabilities, and how we can use them to better our lives. Read this book to find out more about unconscious thinking.