At the risk of being overly negative (but in the interest of possibly saving someone else some time), this may be one of the three worst books I've ever read. I am not exaggerating – I keep a list of every book I read, and it's at the bottom.
If all you need is a barely-sensible motivational speech, go for it. Otherwise, don't waste your time.
I don't use goodreads, but went looking for reviews to see if I was crazy, or if I was missing something, or if it really was as terrible as I thought. These selected reviews sum it up better than I could have:
https://www.goodreads.com/review/show/55761871
https://www.goodreads.com/review/show/732294700
https://www.goodreads.com/review/show/735909209
The reviews seem fairly polarized overall, so maybe the book really does help people. At the very least, I encourage you to read some of them before picking up the book.
If the positive reviews seem like they come from people you'd agree with, then by all means, go for it. Otherwise, stay away.