Philosophical Foundations for a Christian Worldview by Wm Lane Craig and J.P. Moreland
The Devil's Delusion by David Berlinski (even thought he's not a Christian -- yet, but a secular Jew). In fact I wouldn't mind seeing a Berlinski package including some of his mathematical stuff (i.e. A Tour of the Calculus), as well as his I.D. and other scientific philosophy-related works.
In Christ,
Jason