If you have "Born Again" Protestants friends or family, this video is a great one to watch.
I also highly recommend the following from Steve Ray
Crossing the Tiber: Evangelical Protestants Discover the Historical Church
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Abraham Revealing the Historical Roots of our Faith
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Born Again? Faith Alone?
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Finding the Fullness of Faith
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Footprints of God: Over Holy Ground
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Searching the Scriptures: The Gospel of John