This cover didn't make me love it until after I had read the book. Now that I know the story inside, this cover is perfect! The black feathers are a great representation of the main character, a harpy with magic of the shadows rather than the light. The title font is a beautiful sky blue, yet seems to swirl like a storm. The words of the title are a spot-on representation of the main character; she IS the promise, and she IS of the shadows. It is so dark and almost sad- and yet, there is a gloss that is alluring and just enough clear sky peeking through to allow hope that all will be well. I think this cover as a whole is a great representation of the novel.