He named his top ten books on UFOs for the Guardian.
One title on the list:
The UFO Experience by J Allen HynekRead about another book on Pilkington's list.
Astronomer Hynek was an air force consultant on UFOs for much of his life, and over time transformed from something of a Doubting Thomas to a St Paul. He's regarded as a saint in UFO circles, largely for this book, a sober yet sympathetic overview of the UFO problem that excoriates the US Air Force for their failure to treat the phenomenon seriously. Hynek devised the "Close Encounters" system for categorising UFO sightings, and has a cameo during the cosmic disco climax of Spielberg's blockbusting film (that's him with the pipe looking like Colonel Sanders).
--Marshal Zeringue