Barry N. Malzberg 
Dwellers of the Deep 

What! A science fiction novel about science fiction fans? And why not?Or – like it says in this novel:"Do you really think that a group of science fiction fans could save this planet? Could understand this situation to save it?""I most certainly do, " she says. "Who else?"Who else, indeed?Not since Frederic Brown’s "What Mad Universe" has there been a novel like this.