 In these six books de Lugo gives, after thorough discussion, the solution of many difficult cases in moral theology; it consists of questions proposed to him for solutions over long years.The seventh volume, "De Deo, de Angelis, de Actibus humanis et de Gratia" (Cologne, 1716), was published over fifty years after the author's death; the idea, as expressed on the title page, was to complete his printed course of lectures.Other works on theology and especially on philosophy