In the Secret of His Presence: Helps for the Inner Life When Alone With God. E-book. Formato PDF G. H. Knight   -  Forgotten Books, 2017  - 

Books of this class are invaluable helps to Christian living, and can hardly be multiplied too much. But, along with these, there may be some room for books of another class, books dealing specially with the inner soul-experiences which vitalise the life that is seen.