In a nut shell, don’t do what you’re passionate about, do what you’re good at and let the passion come. The first line in the book is “Follow your passion is dangerous advice.”
The essence of the book is that to follow your passion, you must first work to become an expert in whatever field you choose. Too often we pursue passions before expertise and wonder why we fail. His argument is go deeper into a field first and it will be come your passion. “Working right trumps finding the right work.”
Newport argues four rules: (1) don’t follow your passion; (2) be so good they can’t ignore you; (3) the importance of control; (4) think small, act big.