I was a big Sci Fi fan at one time and Robert was one of my top favs .

Then wife got rid of my collection when we moved and I cannot remember anything he wrote .
Presumably about Puppet Masters .
Have never heard of Spinrad -- will check him later .

Never read Sci Fi now as technology news and whistleblower revelations --- real and not so real -- are amazing .
I cannot get enough of the Secret Space Programme though Corey Goode is a real BS merchant .
However , William Tompkins is the real deal -- ex NASA etc whistleblower .

P.S.
Or is he ? Could be one of the best ever misinformation agents .