"Why Are You a Christian?", is an apologetics;--a defense of Christianity. It addresses some PERTINENT questions like:
➡ Does the lack of physical evidence for God mean He doesn't exist?
➡ Do we have Psalm 23 as was written by King David? Was there even a man called David?
➡ If a loving God is in charge of the universe, why can't he prevent evil in the world?
➡ Should we believe Jesus? Was there even a man called Jesus? Was a man called Jesus really crucified on a Roman cross?
And many more!