I'm not going to sugar coat it. This book was a G.R.I.N.D. No joke. This is not for the faint of heart. BUT! It is a great book. The author is a Nobel Prize winning economist. Right. I know. Kahneman describes how are brain processes information and makes decisions. System 1 is the fast-twitch response. System 2 is the deep thought response. System 1 IS A LIAR! System 2 is not much better. But it is trying. Ultimately, Kahneman is trying to get you to think about how you think. Slow down. Give System 2 a chance. It took me MONTHS to get through this book. It requires you to read, let it sink in, put the book down, go take a walk, get a good night's sleep and then pick it up again the next day.