Christopher has published two books (one in collaboration) on C.S. Lewis, published one chapbook of Tolkienian verse, and been an assistant editor of Truths Breathed Through Silver: The Inklings’ Moral and Mythopoeic Legacy (ed. Jonathan B. Himes, Cambridge Scholars, 2008). Besides other editorial work, he has published essays on Lewis, Tolkien, Charles Williams, Dorothy L. Sayers, and some related authors, as well as such popular writers as Anthony Boucher, Ellery Queen, John Dickson Carr, Poul Anderson, Robert A. Heinlein, Isaac Asimov, and Gene Wolfe, and such standard authors as the Pearl Poet, Shakespeare, Coleridge, Hawthorne, Tennyson, and John Heath-Stubbs. He has published well over 150 poems. He has had one play — a farce about a vampire — produced at his university. His book of poems about poetry — listed as Ars Poetica on Amazon.com, but in full The Variety of Poetic Genres: Ars Poetica — was published by Mellen Poetry Press in 2012.