Peter Drucker's "Innovation and Entrepreneurship" ( http://www.amazon.com/Innovation-Entrepreneurship-Peter-F-Drucker/dp/0887306187 http://www.amazon.com/Innova

Peter Drucker's "Innovation and Entrepreneurship" ( http://www.amazon.com/Innovation-Entrepreneurship-Peter-F-Drucker/dp/0887306187 http://www.amazon.com/Innovation-Entrepreneurship-Peter-F-Dr... ) provides more in depth discussion on the topic and should serve as great food for thought.