Well, there's lectio divina.

For what little it's worth, I think there's a prayerful way to spiritually read, that is slower, and there's the more common way to read a spiritual subject as if it were any subject rather than more careful and prayerful reading.

If you can prayerfully read this is very good.

'To get good from reading the Lives of the Saints, and other spiritual books, we ought not to read out of curiosity, or skimmingly, but with pauses; and when we feel ourselves warmed, we ought not to pass on, but to stop and follow up the spirit which is stirring in us, and when we feel it no longer then to pursue our reading.'

St. Philip Neri

'As the reading of bad books fills the mind with worldly and poisonous sentiments; so, on the other hand, the reading of pious works fills the soul with holy thoughts and good desires.'

St. Alphonsus Maria de Liguori

Theresa of Avila recommended it as part of mental prayer in her "Way of Perfection."