Invented by my good friend Al Heystek, and then developed by the two of us. Use it to train for direction, distance and arc while at the free throw line in basketball.
I read this book in 1995 and almost on the spot my life was changed. I've been a student of Integral Theory and Practice ever since and it informs my life every day. Every single Day.
You can learn a lot about my professional work on Linkedin. Not everything, however, as I've not included many of my business clients who request anonymity.