I have the old (1975) book "Writing And Selling Science Fiction" by Science Fiction Writers of America (ie various). https://www.goodreads.com/en/book/show/173

I have the old (1975) book "Writing And Selling Science Fiction" by Science Fiction Writers of America (ie various). https://www.goodreads.com/en/book/show/1739693 https://www.goodreads.com/en/book/show/1739693 and it has lots of good advice. Pretty sure it has the Adam and Eve Trope.