Gil Thorpe is a great diversion and is to book writing as poetry is to prose.
Ironically, in today's marketplace successful nonfiction has to be unbelievable, while successful fiction must be believable.
The uninitiated have real questions and valid concerns over how the things of God appear to them.
As for dialogue, I think it keeps things moving to cut to the chase.
I don't see success as the goal. Obedience is the goal.
I was raised as a Christian but the transaction has to be made by yourself - you and God - at some point.