What Goes into Writing Gothic SUSPENSE novels?

Beginning of my Gothic shade garden Have you ever wondered what goes into writing a Gothic suspense novel or short story? What are the "must haves" to include? What sets Gothic suspense novels, stories or movies apart from other suspense or horror? 

In my guest post over at The Misstery, I wrote all about this topic and answered these and several other questions. Pop over to my post on "Writing Gothic Suspense Novels," for a quick read.