Getting back to reading briefly, the New York Times is doing a poll to see what people are reading on the subway. The results are here and the accompanying article is here. Or you could even take the poll (if you ride the subway in New York).
An while we’re on the subject, a couple of years ago the Booktrust, as part of the Get London Reading campaign, built a great interactive map of books set in London, which can be found here together with other goodies.