Help me listen my way through summer

During the summer, I bike to work. I could pretend that this is because I want to be green and stay in shape, but it's really because I don't have consistent access to a vehicle. Although it is good exercise, I must admit.

The ride is about twenty minutes one-way. I usually listen to music on my 1 GB iPod Nano. Yeah, that's right: I haven't upgraded to the latest model. Shocking, I know. However, this usually means I end up listening to the same music over and over all summer. I suppose I could create weekly mixes or playlists to help keep things fresh, but I'm just too lazy.

So this year, I'm going to try something different: audiobooks. It furthers my goal of reading more, and it's much safer than trying to read a book while biking. Rather than purchase audiobooks, I'm going to try Librivox, a crowdsourced repository of public domain audiobooks. I've gone ahead and created a shelf at Goodreads to track my summer listening. Now only one thing remains: to what should I listen?

I'm open to suggestions. I'm considering some Victorian fiction, thinking that it may be less dry if I listen to it rather than read it. Or should I try some non-fiction? If you have some favourite public domain books, especially ones you think would be better in audiobook form, please let me know.