Jenny Ashford is the co-author of several nonfiction titles dealing with poltergeists:
The Mammoth Mountain Poltergeist, with Tom Ross;
House of Fire and Whispers: Investigating the Seattle Demon House, with Steve Mera, about the Keith Linder story; and
The Rochdale Poltergeist, also with Mera. Now she has expanded her range and compiled a
400-page survey of the poltergeist phenomenon in all its variety.
After a brief overview, the contents
are divided into categories denoting an escalating severity of events, though obviously there are often overlaps in particular instances: 'stone throwers', 'raps, taps, and bangs', 'flying objects & electric anomalies', 'water, oil, and blood', 'pyromaniac poltergeists', 'ghostly apparitions', 'violent poltergeists' and 'demonic possession'. The volume concludes with brief thoughts on theories which have been advanced to explain the poltergeist. Over a hundred cases are listed chronologically within the categories, dating from antiquity to recent times. Some are mentioned briefly where details are lacking, others are discussed in somewhat greater depth. The net has been cast fairly wide, though British and American cases predominate.
Ashford's view is that, leaving aside occasional non-paranormal explanations such as misperception and fraud, poltergeists are generally unconscious projections of psychokinetic energy by individuals as a manifestation of extreme emotional stress, though the mechanisms by which this occurs are as yet unknown. When fraud does occur, that does not necessarily mean that the entire business should be dismissed, as there may a mix of genuine poltergeist alongside deception.
Comment: Update August 10, 2017: Lost Walt Disney UFO Documentary: Full Uncut Version 2013 HD