Here is a study on the new spiritism (demon worship - possession) that calls itself, 'New' but appears to be the same old fashioned mystical communion with devils that was so popular before the flood. (And later revived through the, 'Babylonian Mystery' cults and secret societies)
This, 'spirit guide' - 'goddess worship' business appears to have a lot in common with David Berg's convoluted so called, 'Christianity'. This occult religion is being used as glue (goo) to bind the world's religions together. Ps. Some of the links from the front page do not work properly but the chapters can be reached from the main directory listing below.
A THEOLOGICAL ANALYSIS OF THE NEW AGE MOVEMENT by Dr. J.R. Martin - April 1985