"Thinking, Fast and Slow" is all about how two systems — intuition and slow thinking — shape our judgment, and how we can effectively tap into both. Using principles of behavioral economics, Kahneman walks us through how to think and avoid mistakes in situations when the stakes are really high

What is the difference between fast thinking and slow thinking?

Fast thinking (dubbed System 1 by Kahneman) is unconscious, emotional, and instinctive. Fast thinking results in snap judgments and, sometimes, prejudice. 

Slow thinking (System 2) is what most of us would consider actual thought: it's conscious, deliberative, and mostly rational.

Daniel Kahneman is a Nobel Laureate in Economics who is a psychologist by training. He won the prize mostly for his work in decision making, specifically Prospect Theory. This book distills a lifetime of work on the engine of human thinking, highlighting our cognitive biases and showing both the brilliance and limitations of the human mind.