I've read the whole Venerable Mary of Agreda's Mystical City of God and highly recommend everyone undertake the task and read it, but it should be noted that regardless of all the approbations, some things in her works are worthy of question. Here is one thing she says that is actually wrong, that the soul is not created until 40-80 days after conception:
Vol. 4, The Coronation, p. 264, 265, #281
"281.....the demons, with their vast experience, judge as much as possible of the complexion or inclinations of the one conceived and they are wont to lay out great plans for future action. If they fear good results, they seek to hinder as much as possible the last generation or infusion of the soul, waylaying the mother with dangers or temptations to bring about an abortion before the creation of the soul, which is ordinarily delayed forty or eighty days.
But as soon as they see God create or infuse the soul, the wrath of these dragons exerts itself in furious activity to prevent the creature from issuing to light, and from attaining Baptism, if it is to be born where this Sacrament can easily be administered. For this purpose they suggest and tempt the mothers to many disorders and excesses, whereby the parturition is forced and a premature birth or the death of the child in the womb might be caused; for among Catholics and heretics, who still administer Baptism, the demons content themselves with depriving children of Baptism and thus withholding them in limbo from the vision of God. Among pagans and idolaters they are not so solicitous, because among them damnation is in certain prospect."