While all of his fiction is morally serious, some of Card's work, notably Hart's Hope and the award winning Ender's Game, is very violent. This is not the case, however, with Seventh Son.

Still, his handling of sexual and religious themes may bother some younger readers.

Though he approaches the subjects from a child's point of view, Card is frank about several aspects of adult sexual life. The novel contains a fairly vivid and detailed portrayal of childbirth, and gives information about, but no description of, the sexual relations between Alvin's parents. Because such material is presented from a child's point of view in every case, it remains at a level accessible without anxiety to most readers over ten years of age, and perhaps even to younger readers. The main advantage of such frankness is that it aids a sensitive portrayal of family relations among people...