Gottebenbildlichkeit
Collings has had multiple collections of his poetry published on subjects such as Latter Day Saint theology, Joseph Smith, Christmas, science fiction, and horror. He is known for his literary critiques and bibliographies of the works of Orson Scott Card and Stephen King, though he has also published critiques and bibliographies of the works of Peter Straub, Dean Koontz, C. S. Lewis, Brian W. Aldiss, and Piers Anthony. His "In the Image of God: Theme, Characterization and Landscape in the Fiction of Orson Scott Card" was the first book-length academic look at Card's works.