(Available to download August 11 - August 17)
By Roland Smith
Read by Ramón de Ocampo, Bronson Pinchot,
Hillary Huber, John Morgan, Samantha Quan
Published by Scholastic Audiobooks
By Theodore Taylor
Read by Michael Boatman
Published by Listening Library
There don't appear to be any geographical restrictions on Storm Runners, I haven't yet tried The Cay. You have to download a small piece of software (Overdrive) before being allowed to download the mp3 files.
Download the books from here.