I just picked up Mental Edge by Leszek Badurowicz.
This is not a poker strategy book on how to actually play specific hands, calculate odds, EV, etc..
It is a book on how to approach life as a professional or serious poker player by maximizing your mental edge. I actually really enjoyed the book as the concepts actually apply to any area of life beyond poker. I am working on applying it to non-poker aspects of my life.
This book will likely not get a good review by Mason though as there is a section on goal-setting.
Leszek's website is here:
link