Volume 11 contains over 750 pages with a foreword written by retired USAF Colonel Charles Halt - then the Deputy Base Commander of RAF Woodridge - during the now famous UFO incident that has attracted worldwide attention, which took place in late December 1980. Like its predecessors Volumes 8, 9, and 10, it is also in colour but is even larger in pagination, making it excellent value for money. It continues with further chronological reports of UFO activity over Great Britain, USA, Australia, New Zealand and Tasmania, for the period 1989-1990. As with the former Volumes, published by the authors, this has been painstakingly and meticulously prepared from over 20 years research. It is priced at £25, which is good value taking into consideration the earlier books (Volumes 1-6, approximately 320 pages in black and white, sold at £14.99). John Hanson and Dawn Holloway, with Brenda Butler, have accumulated a vast amount of information over the years, including material from the late Essex UFO researcher Ron West, which identifies the presence of what has become labelled as appearances of the 'Triangular UFO', sighted over Belgium and Europe towards the end of the 1980s and, on occasion, chased by Air Force Jets. They will show that previously unpublished accounts of a 'wave' of similar sightings around the Essex area are now being brought to the attention of the public, who would not have been aware of how prolific sightings were during that period. Disappointingly, recent attempts to attract the attention of the Essex newspapers and media have been unsuccessful. The authors contend than nothing should be left out, as these books form part of our social history. It is their wish, at great personal expense to themselves, that these unique books will endure and provide future historians of the UFO subject an opportunity to see exactly what took place, rather than fading from history. It also includes an examination of UFO reports covering the period of 1963-1964, including some sightings from the archives of Project Blue Book for the first time. In addition, the Volume outlines the valuable commitment made by the researchers themselves and their efforts to preserve what forms part of our important social history, rather than relying on other dubious sources of information. Unfortunately, despite their greatest efforts, the authors have been unable to secure any reviews of their work by any of the National newspapers, although having sent many books to them. The authors point out that very few of the UFO sighting reports published in the Haunted Skies books will be found in any declassified MOD files.