Says Andy about this book: "My wife bought me this book last year before the 2005 Dgrin Shootout at Yosemite. I devoured it. Then, I met Marc at the Shootout, and he explained many of the photographs that he and his Dad made. Truly inspiring." You can meet Marc Muench at the 2008 Dgrin Shootout at Moab, UT as well as through his photography workshops.

You can find it on Amazon.com: Primal Forces by David and Marc Muench