The main character, Sarah, is what I would understand to be a "nobody" (please mark the quotes because it is not meant to insult anyone living in her reality); she doesn't have a family or a home and she's shipped off to some school she never applied to. It happens to be one of the best schools with the ability to bring on success in her future -- something she really wanted to accomplish for herself, which I admire completely. Her drive after the crap life she'd been living is something to desire, really. Sarah's memory is also something to desire... just not in the way she experiences it, but it gives her an edge and proves to be an amazing quality to have in the story (sometimes).
Each of Sarah's friends were well done, giving great support to someone who lived in a way completely opposite of what their lives supposedly were. Though I'm sick of the whole absolutely hot, gorgeous, perfect girls when it comes to schools, they didn't continue to follow the bitchy, bully types, and instead became immediate friends with Sarah.
My favorite of the story is the mystery and suspense behind everything. The more things that happened, the more excited I got... Especially because I come up with my own logical conclusions only to find they were either right or wrong (and wrong conclusions made me want to read more to find the truth). With that said, a majority of negative reviews that claimed confusion could have aroused from when the mysteries started to become revealed, though I never found myself confused once. Let's start with what I didn't like (really, it's only one thing), which contains a spoiler.
The fact that Sarah made some bad decisions when she is actually extremely smart irked me a bit. I mean, if I was told in order to join a society, I'd have to drink blood, my ass would have been GONE. Who, in their right mind, would do something like that? I get that because of Sarah's past, she is inclined and, really, susceptible to doing crazy things in order to have people like her, but man, that's too far for me.
Overall, I really enjoyed this book and didn't want to put it down. It was exhilarating, full of mystery, and just downright engaging. I actually lost track of time yesterday reading this and fell behind on chores I was supposed to do. Please tell me there is a sequel to follow where it ended because I'd really like to see what happens in the aftermath.