This book by Graham Robson was first published in 1986 by Haynes ISBN 0-85429-547-X
I did not realise that a second edition had been published with 4 more sections.
This is a good read for anyone interested in the Group B cars and how it all started.
The link below has gives more detail of the book content.
http://www.sjmautotechnik.com/books/rallybk_robson.htm