Paperbacks are getting more expensive, and much as I enjoy seeing my collection of books on the shelf-I've begun to finally contemplate on other means to get my reading done.

Paperbacks are cool.
I like because you can read them in the bathroom or in public - without
worrying if it will fall, get wet or stolen.
But because they are more expensive now-which do you think is better to use? An audio book or e-book?