For the 504th birthday of John Calvin I want to give away free copies of Institutes of the Christian Religion. I have it available in epub (anything but Kindle can read this) and mobi (Amazon Kindle) formats. Or, if you prefer to listen, a link to an audio book version that is also free.
Whosoever, therefore, gives heed to those teachers, who merely employ us in contemplating our good qualities, so far from making progress in self knowledge, will be plunged into the most pernicious ignorance. – Calvin, Institutes 2.1.2