Further to the review by Michael McGirr on the weekend I did a bit of "book spotting" on the train this morning.
Of the 28 people I could spy on in my immediate vicinity 7 were reading books, 4 were reading newspapers and a couple of others looked like they were reading something but I couldn't see what it was. The books that I could see were: The Joy Luck Club by Amy Tan, Magician by Raymond E Feist, and Crime and Punishment by Fyodor Dostoevsky. The rest I couldn't see. Most people hold their books either up against their chest or in their lap, and it's generally not considered polite to stare too intently in that general vicinity.
I don't consider this sample to be out of the ordinary for the commuters on my trains.