This image is perhaps almost to dark in its representation, although there is certainly a dark thread running through the novel. However this simplistic representation of smoke and mirrors might be better aimed at the more mature spectrum of a YA readership. However that said I think the blue smoke could work well with the castle turrets perhaps edging out of the top. with the text layers then on top and centered.
The Corvin castle in Romania is often cited as the inspiration for Bram Stoker's Dracula. Regardless if that is true or not, it definitely fits the vampire theme for me. Check out 20 of the most beautiful castles in the world on avenlylanetravel.com #AVENLYLANETRAVEL #AVENLYLANE #castles #europe #travel #travelinspiration #beautifulplaces #beautifulphotos