These studies are to be found in The Spiritual Man and The Spirit of Judgment (pdf). The study found in The Spiritual Man is in the chapter on Sickness (about halfway through the chapter). The final three studies are in Part Two of Spirit of Judgment.

These final four studies may be considered the seventh volume to complete the fifty-two weeks of study and should be reviewed again every couple of years because it is easy to forget.

And read this short segment on Kingdom of Heaven and Kingdom of God.