Purgatory

-- Dr. Hahn’s Books:
Catholic for a Reason I

-- Dr. Hahn's Audio:
Answering Common Objections, Practical Apologetics, Stand Up for Your Faith

-- Additional Resources:
Articles: Church Fathers on Purgatory, Purgatory in the Bible, Purgatory, Holy Fire, Purgatory: The Stepping Stone To Heaven
Books: After This Life: What Catholics Believe About What Happens Next by Benedict J. Groeschel