Very in depth study on salvation. Material condensed from volumes upon volumes of writings from 250 years ago. This study will give you the "science" surrounding your relationship between our Lord and man, heaven and hell and spirits and angels.
To test this as the truth, just apply to your life and you will see!
When the Lord speaks in Luke 12:2 about "there is nothing covered, that shall not be revealed; neither hid, that shall not be known". I HAVE THAT MATERIAL (in part) IN THIS BOOK.