Series: Beyond the Circle
The cover caught my eye in the "new books" section at the library, and the story sounded intriguing - a blind girl who suddenly regains her sight? I was a couple of chapters in when it finally hit me - story lines sounded familiar, character names were coming back. Then I realized..... this is Beyond the Circle - a sequel to the Circle series I read a few years ago. Ah!
There certainly was some darkness in this book, but altogether on par with the 3 Circle books I did read, and not the one I abandoned.