I found this book used online at Alibris Books. It's a volume with over 700 pages of Ralph Gibson's work, called Deus Ex Machina, and published by Taschen. Ralph Gibson used Leica cameras throughout most of his 40 plus years as a photographer. His vision of seeing is something that I would like to emulate and improve upon. I was very lucky to find this in such great condition as it's out of print. The second and third copy at Alibris is well over 100 bucks! Taschen and Phaidon publish some lovely photography books.