Dawn Holloway and John Hanson, from Alvechurch, have been hunting down information and witness accounts about strange things in the night sky for almost 20 years.
All the collected information makes up Haunted Skies, a day-by-day account of UFO activity in the UK.
Volume Three, covering 1966 to 1967, has just been published, but not all sightings go back to the 60s.
