Dante's Pluralism and the Islamic Philosophy of Religion . New York: Palgrave Macmillan, 2006.
The Ethics of Life in the Middle Ages: It's Poetaphysics Boccaccio . New York: St. Martin's Press [Palgrave Macmillan] 1998.
The Death of the Troubadour: The Late Medieval Resistance to the Renaissance . Philadelphia: University of Pennsylvania Press, 1994.
Poet of the Rational Animal: An Introduction to Guido Cavalcanti (with a Long Commentary on 'Donna prega me').
Book chapters and sections
"Ramon Llull and Islam." In A Companion to Ramon Llull ., ed. Amy M. Austin and Mark D. Johnston (Leiden: Brill Forthcoming) [10,000-word book chapter, under contract].
"Dante's Commedia , Islamic Rationalism, and the Enumeration of the Sciences. " Doctor Virtualis 12 (Forthcoming).
"Philosophy and the City of Man: The Islamic Roots of Western Secularism." In Mapping the Medieval Mediterranean, ca. 300-1550: An encyclopedia of perspectives in research, ed. Nichols Amity Law (Leiden: Brill, Forthcoming) [7000-word chapter book, under contract].
"Dante did Celestial Soul: The Final Verses of Paradiso . in the Light of Avicenna's Metaphysics " MLN 127, Supplement 1 (2011): 99-109.
"Dante and the Falasifia . Religion as Imagination " Dante Studies 125 (2007): 133-56.
"The Nameless Wild One: The Ethics of Subjectivity Anonymous - Medieval and Modern." Common Knowledge 12, 2 (2006): 219-251.
"Sodomy, Diversity, Cosmopolitanism: Dante and the Limits of the Polis . " Dante Studies 123 (2005): 89-132.