In the interests of full disclosure: Roger was a good friend, for whom I had enormous respect for his success in overcoming the limitations of being a paraplegic. He led a fuller life tham most of us.
For one who has long enjoyed auto racing, but has limited knowledge of what goes on under the hood, this book was a revelation. I felt like Roger was speaking directly to me, in words I could understand. When I got to the end I felt I knew more than I ever expected to, which has increased my enjoyment of today's open-wheel racing.
He is greatly missed.