First of all, that cover? Deeply creepy.
I love what the prologue does to set up the unsettling elements without giving too much away. It's very cinematic. Getting into Ife's voice in the first chapter really made me want to read more... the stakes for her are clear right from the beginning, and it we learn a lot about her in a very short time without having to slog through an infodump. I did get a little stressed out about her texting in class (this is an avoidable problem), but it was believable, and it set up the possibility that she's going to make some dubious live choices later in the story.
At any rate, I'm already looking forward to seeing what happens in this book!