Right now you can get the Free Kindle Book Download: Heir To The Everlasting by Janice Daugharty. From the reviews this one sounds like a fun read. Amazon changes prices without notice, so make sure to check that the kindle price it is still $0.00 before you start downloading this book.
Remember that you do not need a Kindle e-reader to be able to read this book. You can read it on your PC, iPhone, iPad, Blackberry and Android. Just download for free the appropriate application to be able to do that.