Read or listen to this great story from NPR.
“Librarians are finding that patrons are eager to switch over from checking out CDs and cassettes because they love the portability and convenience of digital downloads.”

“…downloading a digital book from the public library works pretty much like downloading audio material from a commercial site — except instead of using a credit card, you use a library card.”

“A recent survey of audio-book users indicated that 51 percent of the books consumers listened to came from the library.”

http://www.npr.org/templates/story/story.php?storyId=7189148