Outline - F. F. Bruce - The Defense of the Gospel in the New Testament (PDF)
Did the apostles and the earliest church, when called for, cognitively defend the Gospel as true or no?
This is for those Christians who accuse you of being an "intellectual pointy-head" when you argue that some non-Christians need to converse with us regarding the truthfulness (or lack thereof?) of the Gospel claims.
Bruce has a chapter on "the defense of the truth of the Gospel to the Jews," another on "the defense of the truth of the Gospel to the pagans." St. Paul, for example, took very different approaches depending on the circumstances (think of him at the Synagogue contending that Jesus was the promised Christ, as opposed to him being on Mars Hill addressing pagans philosophers).
The book for this outline is out of print.