Wow this looks amazing and well done. The art really sets mood for a horror story. I noticed your description that "Wait for the Night" inspired to draw your own version of the cover. Although I never read the book I can tell base on this art alone its going to be a horror story.
I wish many artist who do story book covers would read the book fist and take inspiration from it.
I also love the way your art is positioned I could turn it sideways and it would look like a horizon being fogged up or consumed by the plague.
Keep up the good work. I also wonder is this digitally painted or traditional? If it's traditional what medium did you use?