Blink: The Power of Thinking Without Thinking, is a 2005 book by Malcolm Gladwell which takes a look at why the mind makes decisions in split seconds.
Gladwell focuses on the idea of thin slicing - which is in essence using previous experiences, stereotypes and likes/dislikes to make a snap judgment about a new product or person.
Gladwell offers multiple examples of making quick decisions in a world where we are overwhelmed with information and stereotypes. He also touches on the fact that these stereotypes are very embedded in our mind, which in turns plays a role in the decisions we make when we thin slice and blink. Even with the intention to put these stereotypes aside, they've become such a huge part of society that they make a huge impact on any judgment we make.