I've been asked what books I'd recommend to someone who's getting started in the Christian faith. Here are some suggestions...
Essential Truths of the Christian Faith, by R.C. Sproul
After You Believe, by N.T. Wright
Knowing God, by J.I. Packer
Prayer, by Phil Yancey
A Short Life of Christ, by Everette Harrison
...and a good Study Bible in a modern translation (like the Life Application Study Bible)
That's a good start.