John M. Moran's article in the Hartford (CT) Courant's Courant.com web site describes his library's use of DRM for loaning audio books. Snippets:
But the burning process is a bit cumbersome. My audio book needed five CDs to hold it. Burning all of those discs took more than an hour. I could have driven back and forth to the library twice in that time.
Two weeks after the initial download, the Digital Rights Management software will declare that my borrowing time is up and make the files unplayable. To free up the hard drive space, I'll have to delete them.
To keep listening, in case I haven't finished, I'll have to download the book again. The rights management is a hassle, but you can't blame the publishers of audio books for being careful after the music industry's experience with pirated song downloads.