Peter Bregman tells stories about his life to share ideas on productivity, performance, and life. The ideas are simple to understand though they may be challenging to implement. Each chapter focuses on one key idea. Some you may already do, some you may question. The others may be useful, at least for a while.
Some of the ideas are focused on productivity. For example, he recommends limiting the number of times you check email. The ones I found more valuable address the far more important issues of interacting with other people and managing our own actions and reactions. Better to avoid a fire than have to fight it.
Each story / lesson / chapter is only a few pages long, and each stands alone well enough that it can be read by itself.
Four Seconds is structured like his previous book 18 Minutes. Both are intended to dramatically improve your life by introducing rituals that can be done quickly.
The book is unlikely to make you laugh or cry, but that isn't its goal. It will make you smile, and think, for at least four seconds.