JW Rinzler is a great writer but this book has got some living up to do. Alan Arnold's long out-of-print Once Upon A Galaxy: A Journal Of The Making Of The Empire Strikes Back (which has uncontestable proof that yes, Star Wars was always intended to be a nine-part saga and a hilarious on-set sequence involving the shoot in the carbon freezing chamber where David Prowse, with hysterically bad timing, tries to get Irving Kershner to read his book on fitness whilst Kersh is trying to juggle about eight balls at once. Prowse is lucky he didn't end up in the carbon freeze himself that day.) has always been, for me, the definitive insight into the making of this film.