Comparisons to Laurie Halse Anderson's "Speak" are inevitable, and while there are obvious similarities (i.e. main character who doesn't speak due to trauma, a caustic yet funny first-person narrative) I think this one more than stands on its own. 
 Chelsea's dilemma is interesting, feeling guilt both for causing a classmate to be beaten up but also feeling guilt for reporting the tormenters to the authorities. She really grows as a character in an interesting way, with the support of interesting and layered supporting characters.