This is actually written in a very easy-going and conversational way, so it's not like the kind of faked-up imprecations of various religious and self-help or Church of Materialism or whatever gurus.
The book is divided into chapters on various typical or fundamental elements of all our existences, like, stuff, truth, self, money, values, people, creativity. So there are some lists and analyses breaking down some guidelines for a well-lived life that should be things we at some level already know about or understand, but need to keep in mind.
I think the best part of the book is the memoir element, with the authors talking about their lives and the people and family members they have known, giving some perspective on what they're talking about, but also just recording some really interesting and likable people who made mistakes in life and changed over time, living many lives in one.
So this is both a useful workbook/guidebook, as well as an interesting story.