It's a very easy but intelligent book! Full of common senses! And good senses for investment as well!
Due to lack of time, I'll extract the ten rules he talks about picking good companies and stocks in Chapter 17. They are simple but insightful!
1. a simple business model
2. a "wide-moat" competitive advantage
3. recurring revenue
4. low inventory risk
5. alignment of interests
6. a healthy culture
7. a flat organizational structure
8. low reinvention risk
9. low capital requiremnets
10. favorable demographics