Confrontations: A Scientist's Search for Alien Contact
The second part of a trilogy examined forty UFO cases while Vallée speculated about the possibility of other dimensional interference in our world.
"Confrontations: A Scientist's Search for Alien Contact," written by Jacques Vallée, was the second volume of his trilogy and was published in 1990. Vallée examined forty astounding UFO incidents that were reported throughout the world and mused about the harmful nature surrounding them. He addressed the difficulty in analyzing UFOs and proposed classification and rating scales for the use of ensuing researchers.