On August 31st 1977, normal life ended for the Harper family in their modest house in a hitherto quiet corner of the north London suburb of Enfield.

The initial phenomena was relatively minor – knockings on the walls, and pieces of furniture moving in ways that did not seem normal.

The neighbours searched the house, finding all in order, and they too heard the knocking. The police were called, and were able to witness a chair sliding along the floor. The disturbances went on, getting more intense and more frightening. They were eventually witnessed by at least thirty people.

No other case of its kind has been so well witnessed and thoroughly documented. Incidents are described as they happened, without embellishment, from some six hundred pages of transcripts of live tape recordings. The story of the Enfield poltergeist is regarded as a classic in the annals of psychical research. It has been the subject of worldwide press coverage and several radio and television documentaries.