I have that book and it really is great. He was just such an expressive person and used every outlet he could, it's incredible. I was impressed with his style and how it changed over time from sort of "cartoony" to more impressionistic or something, but always very simple and appealing, at least to me.

If you are interested in learning a bit more about him and how his views evolved over time and things like that I suggest picking up some of the various "scrapbooks" that are out their of some of his writings. "Pastures of Plenty" and "Born To Win" are two really great ones. I think they are both out of print, but I'm sure there are some used copies you can find on amazon or a similar site.

Chris