The Alter Ego Effect

I enjoyed the book and learned a lot about the alter ego effect, although I didn't like how the author is constantly talking about how experienced he is in the field of peak performance. And all the great athletes he coached, I don't think we need this information repeated throughout the book. Also, the fact that he didn't mention the work of psychologists on this subject or how alter ego has been used throughout history by great minds, it makes me feel like the author doesn't know much about what he is talking about. Which bothered me!
Other than that it's a good read.