If you are a lover of thriller or horror books, or even just slightly creepy books, then you’ve probably seen some darker book covers. There are some styles that I think are the best design wise, as they really step up the creepy factor.
Pictures within pictures: You don’t see this one as much as I would like to see it, but they can really be amazing. The ones that are done really well won’t be immediately noticeable and be a total surprise when they are seen. This is not necessarily exclusive to creepy books, but I’ve seen it the most in that genre.
Not your standard girl on the cover: Everyone has seen the usual girl on the cover that is very popular in young adult and romance so I love seeing when it is altered for the purpose having a creep factor or just being different. This can still be done in an elegant way without being disturbing, but that in and of itself can be disturbing when you look at the descriptions of these books along with the cover. Some of these are masterfully done and I really hope this becomes a more popular trend.
Normal scene, or not: Again, these are similar to pictures within pictures where you may not notice anything out of sorts with the cover. It may look completely normal until you look closer. These may not be creepy in theme, but you do sometimes see them used in the thriller/horror genre. These are the kind of covers that are fun to look at for a while until you find all the details.
There are tons of other styles of cover which may be more creepy but I love the covers that have deeper details and make you want to spend a lot of time just looking at them.