This book is written in a plain, accessible style. It tells us that our brain can conveniently be divided into three parts HUMAN, CHIMP, COMPUTER. The chimp is first to react - for instance crossing the road without looking properly - and may give a warning which saves your life. However, the chimp can also make a mountain out of a molehill, sowing seeds for future problems. Someone takes your parking space,for example. Instead of shrugging and maybe moaning to friends, you seek out the parking villain and confront him. Result: nobody wins and nothing is gained, just trouble. The human in the parking scenario would just shrug, the chimp wants to confront someone about it. The computer meanwhile takes in chimp and human reactions and melds them together, to make the personality you become.
This books tells us how to contain(not remove) our chimp, making life easier, better and less confrontational. It teaches us to accept situations which cannot be changed - because they've happened - to move on and plan the future.
I found the various sections helpful, and soon became aware when my chimp was pushing himself to the front of my thinking.
The author helped Chris Hoy to power his way to a cycling gold medal, by helping him contain the chimp and plan various goals to reach on the way to his dream of a gold medal. I just want to get through a day without unnecessary anxiety, and with purpose. If you share those simple aims then this book will help you order your life and bring order to ambition. The added bonus is that the book is an easy read.