He is the author of a book that is groundbreaking, and does not say that lightly. The message stands out for several reasons that might resonate with your audience. The insights were gained after serving low income and vulnerable populations for over 30 years then a (to me at least) "wow" moment followed by two years of focused research and inspiration.
1) It is written for the average folks earning less than the median income who must get much more done with less. It creates foundations without which success in any other endeavors becomes more difficult and frustrating.
2) It avoids a lot of the hyperbole (inflated expectations) of a lot of self-help books and internet hucksters. Likely, progress will be slow, but progress is success.
3) It requires that you think. You cannot slide through like you did 8th grade history class and expect to get any value from the book. Thinking is how you improve your life and it is self-reinforcing.
4) It is the only book on the market that describes and invites you to explore the 10 core enduring principles of personal motivation.
5) Finally, It is written to the individual. An employer or manager might be interested in the book, but it would be an exceptional employer or manager.