Station to Station: Travels with Bowie 1973-76

Childhood Bowie Friend Geoff MacCormack otherwise known as Warren Peace has released a coffee table book of photographs taken during his time with David Bowie. It's a little pricey but no doubt contains some previously unseen photos together with some personal recollections.
The book is available direct from Genesis publications.

Bowie on Dick Cavett 1974

12th may 1974