The main theme of the book is, of course, about habit. Every habits come with the same workflow: cue -> routine -> rewards
Similar to what I learnt from NLP long time ago, we can adjust our bad habits by understanding what the cue and rewards are. The book continues to elaborate the stories behind the theory and suggestion how one can make use of them. This includes both personal habits and social habits.
A very interesting book. Worth the time to read it! I would rate it 5-star but somehow the content is over-elaborated a bit. This is the only complaint :)