Amazon Author Central shows you Bookscan sales for your books broken down by metropolitan statistical area. (BookScan tracks most hardcover sales, but not e-book sales.) This allows me to see which MSAs are buying the most and fewest copies, per capita, of How Not To Be Wrong. Unsurprisingly, Madison has by far the highest number of copies of HNTBW per person. But Burlington, VT is not far behind! Then there’s a big drop, until you get down to DC, SF, Boston, and Seattle, each of which still bought more than twice as many copies per person as the median MSA.
Where do people not want the book? Lowest sales per capita are in Miami. They also have little use for me in Los Angeles, Atlanta, and Houston. Note that for reasons of time I only looked at the 30 MSAs that sold the most copies of the book; going farther down that list, there are more pretty big cities where the book is unpopular, like Tampa, Charlotte, San Antonio, and Orlando.
It would be interesting to compare the sales figures, not to population, but to overall hardcover book sales. But I couldn’t find this information broken down by city.