This is really neat. The book is also available on Amazon. I do loves sites like blurb that let you auto-publish and have a neat and gorgeous way to preview.
Wonderful idea by Lorenzo Domínguez. I discovered this when looking for Subway Stories as I am revitalizing my old project for class. His Subway Stories is a book collection of photos taken on the subway and categorized by subject like Sleeping and etc, also on blurb: http://www.blurb.com/books/1055070