
Some of the stuff I found most satisfying was proper modern Christian Apologetics, such as the Handbook of Catholic Apologetics. But the Eastern writing is excellent getting across the scale of the infinite and relating that to people on a personal level.
[1]: http://www.amazon.com/Handbook-Catholic-Apologetics-Reasoned...
[1]: http://www.amazon.com/Handbook-Catholic-Apologetics-Reasoned...