Spend your money elsewhere. For someone who supposedly lives in the vicinity of Yellowstone he knows and sees little. To anyone who steps outside of the sealed up world of their car and even casually looks, the senses are all brought to life with sights sounds, smells, temperatures, textures and colors. Cahill does not inform. He is not even a very good writer, for if he were, he'd do the same thing I did, huck the book into the trash. Go to Yellowstone yourself and hang out the windows of your car and even that simple pleasure will tell you how inadequate this book really is.