I read that book when I was in high school. I can’t remember if I took it out at the school library or the public library, but it is surprising what the school actually had (like Von Daniken stuff).
I don’t remember the book much anymore, but I remember the Andreasson Affair creeped me out more than most other books in that genre.
Fairly well written for effect, if I remember.
While I classify all that stuff as professional tabloidism, I am still a fan of the genre. I just treat it like fiction.
The idea that we would be manipulated as a species is not hard to imagine when you consider how much effort humans put into cultivating and domesticating so many plants and species of animals, both for food and for work.
But when you think about it critically, you just have to ask, why all the clandestine secrecy?
Animals all know who their human overlords are. Farmers and ranchers and flock herders don’t hide in the shadows.
Human psychology is too fragile to learn that we aren't the ultimate creation in the universe. That is probably the same reason UFO stuff is kept secret.