Flying saucers, big-eyed humanoids, nocturnal abductions, and mysterious signals from space—all these are UFOs, the subject of heated debate and wild beliefs. But where UFOs appear, we should also expect men in black. British author and paranormal researcher Mark Pilkington set out to discover the real identities of secret agents who claim to know where flying saucers come from and where aliens hide, but who do everything they can to keep ordinary people in the dark. What lies behind the image of a silent agent covering their tracks? Is there a connection between UFO visits and the activities of the secret services? And if so, what are they hiding from us? 'Ufologists in Plainclothes' is an inclusive study of the UFO mania that swept the planet in the middle of the last century and continues to this day. From UFO conventions to American military bases, from the Nevada desert to the Detroit slums, Pilkington interviews a wide range of people, from alien enthusiasts to reluctant secret agents, delving deep into the history of supposed extraterrestrial contacts and arriving at counterintuitive conclusions that will change your understanding of not only aliens but also humans.