Get a free album of music from iTunes U (which includes courses from Stanford University and Carnegie Mellon), that you can download to your Kindle (or iphone) for listening while reading or just while sitting on the beach). You don't have to be a student (at Stanford or otherwise) to get the download. But, you might want to check out the numerous free courses available at Stanford U or Carnegie Mellon U on iTunes.
Get the album, Summer Mix 2009, HERE.