Immediately, by the title, you get the impression that Passion is not important, and this interests you to start reading. The author, however, tells a different story at the beginning of chapter 1. Passion is important.
The major key here is that Passion is important after the fact that you complete something you are interested in. Let's say you have a project or idea in the works. You will never be fully passionate about it. It's impossible to keep up the act. But keep on moving, and you will find that when you complete the project, whatever that may be, you find that you truly had passion the whole time. You are proud of yourself. You completed something. Now start on the next thing. However, don't trust that passion alone will ever get you there.
You have to work.
Take action.
Passion does not take over procrastination. So don't wait for passion. Start with action to completion.
This book is good, but long winded. If you get the idea in this review, that's all you need. But if you need more encouragement, go ahead, make the purchase and enjoy. I did!