This book works from the idea that genius is made not born, and that human beings are gifted with an almost unlimited potential for learning and creativity. It does not deal with the reality that some humans start ahead of the others in intelligence, but the approaches it discusses will indeed elevate us all.
Leonardo da Vinci, was the model for the book but it would be unfair to assume that everything in it is his wisdom and creative approach. The author added his own message which was traditional for creative thinking approaches.
The books goal is to enable us to uncover our own hidden abilities, sharpen our senses, and liberate our own unique intelligence by following the example of Leonardo da Vinci.
I think that goal was achieved with some of the chapters but not all. Some of the exercises and approaches in the book were unique. They alone make the book worth reading
"Learning never exhausts the mind."
Leonardo da Vinci