Book excerpt: From the back cover of the book, quoted in part:"The America Karal Ann Marling (the author) refers to is small-town America during the depression era; in particular those communities that were portrayed in the 1000-odd murals that appeared in post offices around the country under the auspices of the Treasury Department Section of Fine Arts. She goes far beyond an investigation of the murals as art, and 'Wall to Wall America' becomes an intelligent, often irreverent, discussion of popular taste and culture during the depression decade. "