There's been a disturbing trend where authors interview extremely wealthy and successful people for generic self-help advice. These books sell very well because, in our modern society, it is difficult to disagree with wealthy people.
Wealthy folks are more confident and they can back up everything they say with money. But that being said, I'm not so willing to concede a point to someone who is wealthier than me. In fact, I would say that I derive meaning from my intensive wealth generation so that I don't have to kowtow to a wealthier guy. One approach is to become one of the 1%, then 99% of folks around you can't browbeat you because they are wealthier than you.
All this being said, Richer, Wiser, Happier by William Green is, when reading deeply, a fairly subversive piece of work.
On the surface, it does its job deconstructing the successful traits of wealthy people by simplifying their thought processes for the layman reader....