Detailed article about how the business of evangelical fiction in booming in the United States. In 2004, it was worth $2 billion so obviously there's a big market.
According to a recent Fairfield University study, there are 159 million adult Americans who now call themselves Christian, of whom 46% label themselves as "born again" and 24% as "evangelical".
As a secularist, I can't say I'm keen to see the rise of a faith-based popular culture. Fiction based on The Rapture is one thing but I hope I don't see Hollywood films where God intervenes in the end.