I read it when young, unemployed, and unsure of my career path. Didn’t do much good.
None of these career advice books don’t do much. Except for the person who writes and sells them.
It’s nothing more than regurgitated bulls__t that is nice in theory but doesn’t work in practice.
I read that book and some similar books. The books talked of how you should send out broadcast letters to decision makers in companies, and schedule informational interviews with people to get career advice.
It was of limited value to me. Some of those books also direct you to career guidance firms such as Haldane and Associates. I have a close friend who went to Haldane. It cost a lot of money but he didn’t get a great new career path from the experience.