 A massive and wide-ranging work, composed during Aquinas’s term as bachelor of theology and the first part of his first term as master of theology. Until the Leonine version is published, the best Latin text is the edition by Pierre Mandonnet and Maria F. Moos (Paris: P. Léthielleux, 1929–47), which is complete through book IV distinction 22. The  Aquinas Institute  (Wyoming) is producing an online English translation that is nearing completion and looks to be of high quality.