Introduction to a Philosophy of Religion (Franciscan Herald Press, 1970)

Herald Press, 2007.

Reissued by Herald Press, 1993.

American War and the Gospel translation, Herald Press, Scottdale, Pa., 1974.

The art of living, with Alice von Hildebrand (Franciscan Herald Press, 1965)

Celibacy and the crisis of faith, (Franciscan Herald Press, 1971)

Chicago: Franciscan Herald Press, 1978.

Chicago: Franciscan Herald Press, 1976.

Herald Press, 1993.

Chicago: Franciscan Herald Press 1982.