I really enjoyed this.  

How to write Horror Fiction was written in 1991, which is at the very end of the Heyday of the 1970 and 80's mass-produced horror paperbacks.   Think of the early works of Stephen King, Anne Rice, Frank Herbert, et al from this period.  Aren't they some of their best works?   

So it was really interesting to read William F. Nolan's (author of Logan's run) opinions on what this horror was, and how it works.  

I would recommend this to readers (almost certainly inspired by Grady Hendrix Paperbacks from Hell) of 1980's horror novels - who would like to understand more about what makes these books tick.  As well as a new writer thinking about going into creating darker speculative fiction.  To be honest 95% of what he has written still holds true today.  

Now I am going to see if I can find a portable cassette recorder to take notes on as he recommends :)

 PS some of the attitudes, toward authors that are not white males, and also toward mental health issues, come straight from 1991 - interesting in themselves!