What is the author's style in For Love of Evil by Piers Anthony?

Piers Anthony's novel is about a world of magic, myth, and the supernatural. God and Satan are real characters, and Heaven, Hell, and Purgatory are real places. Death, Fate, War, Nature, and Time interact. All these concepts are large, important ideas that cross boundaries of culture. When Zane finds himself in such an important role, he begins to take on a mode of speech that reflects that importance, sending off Satan's minion with a "Be gone, vermin," whereas earlier he rushes at Molly Malone's attacker with the more prosaic, "Leave Molly alone!" His language in the course of the story becomes more formal, high language, in keeping with his station as Death.