First published in 1921, Fr. Prummer's Handbook of Moral Theology was immediately regarded as an international classic. The author's clarity of vision, precision of expression, and humble fidelity to the traditional Catholic moral framework during a period of social upheaval and increasing doctrinal deviation made his manual the standard reference text for generations of clergy, seminarians, and laity. For those seeking answers to moral questions, the Catholic advice was often "Look it up in Prummer!"

At long last, this centenary edition restores the superb English translation of 1956 in a fresh new typesetting, making Fr. Prummer's original text much easier to navigate and more pleasant to read. The many citation errors that plagued earlier editions have been painstakingly corrected, and scores of additional citations have been added from Aquinas's Summa Theologiae, Denzinger's Enchiridion, and the Roman Catechism - three of the author's favorite sources. The topical index ha