I believe it was actually Albert K. Bender who came up with the Men In Black. Keel was only a popularizer.
"We advise those engaged in saucer work to please be very cautious."
No. Read the book. John Keel could use the money. They certainly didn't pay him for the movie.
It's all bogus, of course.
Keel is an interesting writer. He also invented or at least popularized the Men In Black as MIB. I'm sure he never got any money for that either.
He's a pulp writer who had a huge but essentially invisible impact on pop culture or society.
I believe it was actually Albert K. Bender who came up with the Men In Black. Keel was only a popularizer.
"We advise those engaged in saucer work to please be very cautious."