Principles is one of the best books I've ever read.
I was always surprised that there is little to none of the best knowledge transfer between generations. As a result each generation has to start at zero and figure out life themselves again and again. Our technology is improving at a rapid rate, and yet our life skills barely moved, and some could argue even deteriorated over generations. I feel this book serves that stable platform to step on and to move further in life.
Unfortunately I spent a lot of time learning the hard lessons myself. However, on a good side, only after that I can assess the quality of the book. That makes me appreciate it, as it fully aligns with my life experience and world view.
Do NOT listen to the audiobook, but read the book instead. The book is very well structured and that structure is lost in audio format making it much harder to absorb.
If you want to achieve things in your life that book should be your number 1 to start with. If you manage people, it also should be your No.1. I definitely will be re-reading it again soon.
Update 1: There is a summary version of the book called Principles for Success which should be No.1 to read for everybody.