A friend of the blog, Zack, has done something similar to me and begun creating his own Kindle books for personal use. He has given me permission to share them for the rest of you to download. You can pay Zack a visit at his blog, The Stranded Scholar, where he has lots of other more scholarly free resources. For me, the highlight is definitely being able to have Hodge's 3 Volume systematic theology tucked away and searchable in my skinny little Kindle.
Abstract of Systematic Theology by James Petigru Boyce
Institutes of the Christian Religion (Beveridge Translation) by John Calvin
The Scriptures by Francis Turretin
Systematic Theology (3 Volumes) by Charles Hodge