The Pew Internet and American Life Project says 21% of Americans have read an e-book in the last year as of February. That's up from 17% in December.

It also surveyed Americans to find out what they like about e-books versus print books. The result is below. As you can see, print books are only better for reading with a child, and sharing with friends.

Follow the Chart Of The Day on Twitter: @chartoftheday