The Baker Encyclopedia of Christian Apologetics by Norman Geisler
Jesus Among Other Gods The Absolute Claims Of The Christian Message By Ravi Zacharias
Faith Has Its Reasons: An Integrative Approach to Defending Christianity by Robert Bowman and Ken Boa
Five Views on Apologetics, Steven B. Cowan, Editor. Zondervan, Grand Rapids, Michigan, 2000. Excerpt
Mere Christianity: Comprising the Case for Christianity, Christian Behaviour, and Beyond Personality by C.S. Lewis. If you’re looking for a book that explains the logic behind the Christian faith, this is it.