What is the author's style in The Beautiful Side of Evil by Johanna Michaelsen?

Michaelsen writes with a clear agenda - to warn her fellow Christians and the public at large about the dangers, potential and real, of what she calls "the beautiful side of evil." This, in her perspective, is the way in which Satanic, and specifically occult, influences, present themselves as miraculous, affirming, and even Godly. It seems clear that her background gives her specific and accurate insight into the issue she's addressing - she is, she says, the victim of exactly the kind of deception she's writing about, having experienced Satanic influence at the core of what she defines as occultic practices that she had once believed were manifestations of the miracles of God.