Go to Gary North's web site to read excellent books on the Bible and Christian thought. Not only are the books interesting, challenging, and timely, they really are free.
Or, go to Mises.org for a host of free books on Austrian Economics and the free market. You can read, or download and read, all the classics, including Human Action and Man, Economy, and State.
The Blessed Economist runs a great blog that addresses economics and political philosophy in a biblical sense. Though I'm not saying I agree with everything posted, it is all very thought provoking.
Enjoy each of these sites.