Have you read this story? It's gripping and shows so many of the topics that you've had as topics. It's more accessible for moderate Christians because a Christian can look at it thinking "that's Islam, not Christianity". Maybe this story would be good for discussion, or maybe have this person on the show (PureInertia)?
Anyway, if you get 1/3 of the way through it and find it boring, then I'll wonder if you are a human being!
So, did you see in the story what "Regal Archer" is?