Questions encouraging the reader to go to the source for further information. Proselytization takes place ready or not. Or as happened to me recently, we learn Biblical facts as the result of the Bible fiction we have read. Or perhaps the educated Christian may decide the author has taken literary liberty, as our family has more than once, resulting in unintentional Bible study. It is very seldom that the fact is not in the Bible.
Most authors do their homework.
At the suggestion of his wife, evangelist Al Lacey financed much of his ministry writing westerns. He wrote many years for secular publications. As his editors changed, he trained them to accept his manuscripts without extreme alterations. Eventually, he got to the end of his rope. The new editor flatly refused to accept Mr. Lacey's manuscript without the insertion of sex scenes.