Too many cases of ''accidental'' alien contact...UFO cults praying to the skies...secret ''psychotronic'' weapons for bending the human mind. The evidence Jacques Vallee reveals, after many years of scientific investigation, adds up to something more menacing than monsters from outer space. Messengers of Deception documents the growing effect of UFO contact claims on our lives and of the belief systems prevalent in our society. It explores the hidden realities of the cults, the contactees, the murky political intrigues and the motivations of the investigators. ''As suspenseful as a Hitchcock Thriller, brilliantly argued . . . a smashing achievement.'' - Robert Anton Wilson