This may be the best book on this topic. With all the involvement in occult experiences that resulted from the Pentecostal/charismatic "renewal", there is now so much evidence about Christian demonization that the old a priori idea according to which "Christians cannot be demonized" should be hold by anyone serious and honest. Dickason covers a lot of studies and gives a comprehensive view.
What lacks are philosophical considerations about the functionning of demonization in the soul, as opposed to the epistemological understanding of the mystical experience (Christian philosopher Maritain built a brilliant epistemology that encompassed mystical experience). Also a distinction should be drawn between the initiation of occult experiences (where one seeks the experience by making his mind and body control open to a spirit, at least at the first time) and the mystic experience (where the experience is not sought the first time, or sought without offering one's mind,etc.)
Responsible Christians who are in touch with the charismatic movement may not want themselves or their friends to be exposed to demonization, they will then do well to read this book and other ones such as George Birch's The Deliverance Ministry (Cases of deliverances of spirits of tongues and others caught during charismatic experiences) or the books by Kurt Koch (Occult Bondage, etc.), or Felicitas Goodman's "How about Demons? Possession.." (Goodman is not Christian, but possibly the world's most eminent academic specialist on demon possession and she classifies pentecostal/charismatic experiences in her branch.)