I found the book a bit cheesy, a "feel good" kind of book ... Based on this book bosses are always good and right, and full of wisdom which is often based on the inside information you are not (supposed to be) aware of. All blame must be on you ...
The book doesn't address the actual scarcity of jobs in the current market and cruel competition for workplaces, and how it affects internal environment at companies.
The book is based on the rosy premises that if you are not fond of your current boss, job or company, you can either do something with yourself (learn, become more political, get patience, etc) or just easily quit and move on to the next opportunity that is always around the corner and will surely be more exciting.
It doesn't work this way any longer, and even the author's "eternal optimism" salesman attitude can't compensate for the lack of practical usefulness of the book. And the book is relatively fresh, of 2016, so the author was supposed to be more grounded by that time (if he didn't start the book in 1960s and decided not to change the book's concept since then).