I heard yesterday that Allan Scott's follow-up book to his one on the TWR Jaguar XJS's, about the TWR Rover SD1's, is due to be released in the next 2 or so weeks.
I am unsure on the price - I will be buying it regardless!
Anyone who has the XJS book will definately require this book as well, I believe it is about 20 or so pages bigger then the Jaguar, and a bit more technical, but will certainly give a better understanding as to 1980's Group A Touring Car Racing.