Shatter

"Sixteen-year-old Salem knows her sister Carrie's death was no accident--it was a conspiracy. But no one else at her high school believes her, and all she has so far are theories and clues. With Carrie's killers still out there, Salem's not sure who she can trust. If she can't she prove she's right before it's too late, Salem might end up sharing Carrie's fate"--