Jacques Vallee is a no-nonsense investigator/scientist. His background is information systems and networking. He developed data bases of UFO sightings and saw strange correlations between certain elements in all sightings.
Like John Keel, he is not well liked in the UFO-nut community, because, although he believes that UFO’s are real, he does not support the extraterrestrial hypothesis.
His book “Dimensions” is riveting. He goes back through history and shows that UFO’s have been with us a long time, and that the idea that they are “aliens” visiting Earth makes no sense when you look at the nature of actual sightings.
http://www.bibliotecapleyades.net/ciencia/ciencia_vallee_a.htm
A very good synopsis: Heretic among heretics: http://www.bibliotecapleyades.net/ciencia/ciencia_vallee08.htm
Thanks for the explanation.