El secreto del profesor (Clara Nox, 2)

The first time I saw a monster, I thought it was the worst thing that could ever happen to me. I was wrong. The worst thing was letting the thief escape, taking the only thing that protected us from them. My name is Clara Nox, I'm thirteen years old, and New York is still my home… though nothing is the same. Between boring classes, classmates who think they own the school, and monsters lurking in the shadows, I've learned that some mistakes can't be undone. Now, the air sample is in the wrong hands, and it's up to me to get it back before it's too late. If I want to protect the ones I love, I'll have to face the darkness… and discover how far my own light reaches.