[Sherman Logan]

Measures, to the extent it does, the political orientation of that subset of the population which buys books from Amazon.

While politically incorrect to mention it, I would expect that black and Hispanic voters buy fewer books from Amazon than do white voters.

I’m in a lot of homes in my line of work, mostly upper-end ones, and it is amazing to me how many of them have few/no books around.

[st.eqed]

Yes, but it is encouraging to see that conservatism sells. Chick-fil-a was just the beginning. (I hope)

[Truth29]

"I’m in a lot of homes in my line of work, mostly upper-end ones, and it is amazing to me how many of them have few/no books around."

Don't overlook ebooks. The percentage of electronic book downloads has been moving up rapidly and IIRC it is just about 1/2 of all Amazon book sales.