Two books that I've spied people reading this week are "god is not Great:How Religion Poisons Everything" by Christopher Hitchens and "Harry Potter and the Deathly Hallows" by J.K. Rowling.
There has been plenty of reading on the train but I had a really hard time seeing the titles for some reason and I didn't want to stalk people as they read.
I did ask a passenger sitting next to me what book she was reading on her Kindle. She was reading news from the Arizona Republic. It was the first time that I got to look at a Kindle in person and the screen is not computer-like at all. It looks just like a printed page from a newspaper or book. And it holds 1,500 books or something like that. I may have to reconsider.