Armstrong, Regis J., and Ignatius C. Brady, trans. Francis and Clare: The Complete Works. Mahwah, NJ: Paulist Press, 1982.
Armstrong, Regis J., J. Wayne Hellmann, and William J. Short, eds. Francis of Assisi: Early Documents. 3 vols. New York: New City Press, 1999–2001.
Burr, David. The Spiritual Franciscans: From Protest to Persecution in the Century after Saint Francis. University Park, PA: Pennsylvania State University Press, 2001.
Delio, Ilia, OSF. Franciscan Prayer. Cincinnati: St. Anthony Messenger Press, 2004.
Esser, Catejan, OFM. The Origins of the Franciscan Order. Chicago: Franciscan Herald Press, 1970. Translated from the German edition.
Franciscan Archive. The Writings of St. Francis of Assisi, translated from the critical Latin edition of Kajetan Esser, ofm (1976); a publication of the Franciscan Archive, 1999; available online at http://www.saintsworks.net/books/St.%20Francis%20of%20Assisi%20-%20Writings.pdf.
Green, Julien. God’s Fool: The Life and Times of Francis of Assisi. New York: Harper & Row, 1985. Translated from the French edition. Published in paperback in 1993.
Habig, Marion A., ed. St. Francis of Assisi: Writings and Early Biographies: English Omnibus of the Sources for the Life of St. Francis, 4th rev. ed., translations by Raphael Brown, Benen Fahy, Placid Hermann, Paul Oligny, Nesta de Robeck, Leo Sherley-Price, with a research bibliography by Raphael Brown. Chicago: Franciscan Herald Press, 1983. A two-volume paperback edition was published in 1991.
House, Adrian. Francis of Assisi: A Revolutionary Life. Mahwah, NJ: Paulist Press, 2001. Published in paperback in 2003.
Manselli, Raoul. Saint Francis of Assisi. Chicago: Franciscan Herald Press, 1984.
Sabatier, Paul. The Road to Assisi: The Essential Biography of St. Francis, edited by Jon M. Sweeney. Brewster, MA: Paraclete Press, 2003. Published in paperback in 2004. Sabatier’s influential biography was first published in 1894.
Thompson, Augustine, OP. Francis of Assisi: A New Biography. Ithaca, NY: Cornell University Press, 2012.
Ugolino, Brother. The Little Flowers of Saint Francis, introduced, annotated, and rendered into contemporary English by Jon M. Sweeney. Brewster, MA: Paraclete Press, 2011.
Vauchez, Andre. Francis of Assisi: The Life and Afterlife of a Medieval Saint, translated by Michael F. Cusato. New Haven: Yale University Press, 2012.