These are a couple of books I have read and
can recommend, click on the cover for more details from amazon.com
Kathleen Jo Ryan leads a group of 15
writers all of which travelled through the Grand canyon
during the summer of 1997. This is a superb book which really expresses what
it is like to run the GC.
This guide book has crossed the US with me, the map at the back is covered with green highlighter
following my routes.