Paul, I'm not aware of any, unfortunately. I'm still waiting on a Ken Miles biography.
I did see one mentioned in Autoweek yesterday, however, that should be of interest to many Cobra fans: a new Dave Friedman book with something like 500 photos covering the racing history of the Corvette. It's $75 but sounds like a pretty nice piece. Supposedly going into print yesteday and available for preorder at
www.corvettethunder.com
Bob