Originally a professional musician, Timothy Good began researching UFOs in the 1960s and is one of the UK's authorities on the subject. He had a good relationship with Lord Hill-Norton, who wrote forwards to some of his books, and managed to forge relationships within the security state that gave him access to fascinating data.
Above Top Secret: The Worldwide UFO Cover-up
Beyond Top Secret: The Worldwide UFO Security Threat
Alien Liaison: The Ultimate Secret
Alien Base: Earth's Encounters With Extraterrestrials
Unearthly Disclosure: Conflicting Interests In The Control Of Extraterrestrial Intelligence
Need To Know: UFOs, The Military, and Intelligence
EARTH: An Alien Enterprise