With Khaled Anatolios, Catholicism & Orthodox Christianity, 2nd ed. New York, NY: Facts on File, 2006.
With Martha A. Morrison, Judaism, 3rd ed. New York, NY: Facts on File, 2006.
Protestantism, 2nd ed. New York, NY: Facts on File, 2006.
“The Theological Role of the Fathers in Aquinas’s Super Evangelium S. Joannis Lectura,” Reading John with Saint Thomas Aquinas: Theological Exegesis and Speculative Theology, eds. Michael Dauphinais and Matthew Levering. Washington, DC: The Catholic University of America Press, 2005.
Twelve articles in Oxford Dictionary of National Biography, eds. H.C.G. Matthew and Brian Harrison. Oxford: Oxford University Press, 2004. (William of Alnwich, Nicholas of Ockham, Richard of Middleton, Roger Marston, Robert Fland, John of Reading, John of Walsingham, Robert of Walsingham, John the Canon, Simon of Faversham, Maurice O’Fihely).