Spies, Lies, & Cupcakes

My name is Luna, and everyone thinks I'm a good person who gets good grades and follows the rules. What they don't know is that I've got secrets. A lot of them. And if anyone ever found out about them, I'd be in deep trouble. It's a good thing I'm great at keeping secrets. Or well, I was until Grey Sawyer finds out one of my darkest secrets of all. Grey is one of the most popular guys at school, and he hasn't always been that nice to me. So I expect him to tell everyone what he found out about me. But strangely, he doesn't. That should be a relief except, turns out, he isn't the only one who knows a secret of mine. And this person is trying to blackmail me. I need to find out who they are and quickly, before I end up in a lot of trouble.