I've mentioned before that one good (and enjoyable) way to learn philosophy and sharpen your philosophical skills is to read some of the steady-stream of books that come out looking at artifacts of pop culture.
Here's the latest: Lost and Philosophy: The Island Has Its Reasons. Christian philosopher Doug Groothuis mentions that a couple of his friends contributed to it, so I assume some of the entries are written by Christians. Popular philosopher Tom Morris (who formerly taught at Notre Dame) also penned an endorsement.
