Matt Chandler's The Explicit Gospel. Our college group was reading this around the time we were leaving last year but I never got a chance to read it.
The other is one of my favorite stories of all times. Jane Austen's Pride and Prejudice. I'll take this book in whatever format I can get. For this one you'll need to use the coupon code PRIDEFREE.
These are both from separate websites and you'd have to set up an account to download but I didn't have to enter any credit card information for either so that's nice. To download into iTunes I selected the M4B format and saved it so it opened up in my audiobooks section in iTunes. Maybe these will make any summer travel you have to do a little better. Enjoy!
I found both of these on Money Saving Mom.