Hans Holzer

I've been reading some of his books. IMO, they're pretty darned good. Anyone know why his stuff sort of died out? Other than the fact that he died?
Scientific Committee to Evaluate PseudoSkeptic Criticism of the Paranormal
https://debunkingskeptics.com/forum/
https://debunkingskeptics.com/forum/viewtopic.php?f=5&t=2654