I didn't create this image but I wanted to upload it anyway. It reminds me of The House of Night because it represents what I think of when I imagine Nyx, the Goddess of Night from the series. This is the image I use as wallpaper on my iPhone.
Just so you know, Nyx does not originate from those books. She is a greek goddess. Secondly, she is actually worshipped by few pagans now-a-days, so please keep in mind that you are dealing with a beloved deity of a very real and very old religion when you post ANYTHING about Her. House of Night series may have borrowed heavily from the real-life religion, but it did not invent it. Lastly, it is against DA policy to upload artwork that is not yours. It does not matter if other people do it. It is prohibited.
I realize that this is an old post, so you may have already learned these things. If so, I'm relieved.