7 things the most-highlighted Kindle passages tell us about American readers

Conventionally, the most common way of gauging the most popular books in America has been looking at the New York Times' bestsellers list. But as we shift from reading on paper to screens, there's an interesting new option: Amazon's lists of the most-highlighted passages and most-highlighted books on Kindles around the world.

Here are seven things the lists tell us about Americans reading today: 1) The Hunger Games is really, really popular, 2) The Bible is also extremely popular on Kindle, 3) A lot of people start classics -- but probably don't finish them, 4) Readers want to be told what to do, 5) Modern novels are pretty scarce, 6) Lots of medical students are using Kindles to study, and 7) George W. Bush has made his mark.