Song of Blood and Stone is making a very early bid for the cover of 2015, because it has won every week of 2015 thus far. Zodiac is the next challenger!
These covers are both super gorgeous, and somewhat similar. It's the use of colour and the subtle design bits that really make both covers outstanding. The title is bold and distinctive, and there are lighter and the use of light versus dark colours is creative for both covers. Song of Blood and Stone does it as a silhouette, and Zodiac does it with a nice gradient mix. I wouldn't mind reading either of these, based on purely on the cover!
Now, dear readers, it is up to you! Vote for your favourites! And may the best cover win!