Writing a non-spoilery review is hard, but we're going to try it. (aka, I'm not revealing any more than you can gather from the back cover.) 
 Lucy has a pretty normal high school life--she's part of the drama club with her super-hot boyfriend; she's inseparable with her best friends (one of which is the token drama club gay guy); she has a rival in the drama world who she's convinced is out to ruin her life. It's all pretty standard. 
 And honestly, I started reading this like, "I'm really not in the mood for some silly girl's high school drama," because that's exactly how it starts. 
 But of course, then everything changes. Lucy takes advantage of her fake I.D., and a night at the club turns into more than just a way to let off steam. 
 I may have shed a few tears. Because suddenly, your stupid high school rival is just stupid. The dumb thing your boyfriend did doesn't matter. Because there are bigger issues in the world, and now you have to deal with them. 
 Lucy is totally relateable--even if we haven't gone through the same experiences, you're a part of her experience. You laugh and cry along with her; you understand what she's feeling. And, yeah, she makes some stupid decisions and isn't always right, but that's part of what being a teenager is, isn't it? 
 Sometimes you make decisions that have long-term consequences. And it sucks, but you deal with it best you can. Helps to have a support system, too, and people who will love you no matter what. (If only everyone had such people surrounding them all the time.)