Long has published nine books, including The Life and Works of Richard Fishacre, O.P., Prolegomena to the Edition of his Commentary on the "Sentences", published in 1999; editions of parts one and two of the second book of Fishacre's Sentences Commentary (2008 and 2011); "Adam of Bockenfield, 'Glossaae super De vegetabilibus et plantis': A Critical Edition with Introduction"; and, most recently "Hagar's Vocation. Philosophy's Role in the Theology of Richard Fishacre" (CUA Press, 2015).