Nigel Cawthorne & Rupert Matthews 
Poltergeists [EPUB ebook] 
and Other Hauntings

This book is an exploration of the phenomenon from earliest times to the present day that highlights the variety of activities of these most frightening of phantoms, the efforts of researchers to document and understand the phenomenon and the explanations that have been put forward. Written in an easy-reading style that makes this potentially complex and difficult subject understandable to the non-specialist.