Christian publishing is bigger than it has ever been before. Christian themed merchandise and media in general are bigger than ever but publishing especially has taken off.
This includes both fiction and non fiction books as well as a wide variety of magazines. The Christina lifestyle and belief system are approached from almost every angle.
As a Christian myself it is sometimes frustrating to see how much the faith has been commercialized. But at the same time I am glad that people are trying to keep the Lord and his teaching so close to their lives.