Read this because a student asked me to, and I'd like to go back after break and be like "so I read this book, about a couple of sisters...." 
 Sydney Tate is one of the smartest kids in school, and also the biggest troublemaker. She smokes pot and skateboards everywhere. Meanwhile, her sister Allyson is the polite, well-mannered girl who bakes muffins all the time. They both notice the hot new boy who just moved in next door. Ally is totally into him. Syd thinks he's creepy. Boy makes weird documentary movies by wearing tiny cameras that people may or may not notice. 
 WARNING HERE BE SPOILERS 
 (view spoiler)[I think it was supposed to be a Wild Twist at the end, that Syd and Ally were the same person? Ally never mentioned friends, and the shifting perspective made it clear that the two were experiencing the same events in different ways. It was handled clumsily, though; sometimes Ally was completely ignored by third parties and sometimes she attempted interaction as part of the scene, or a second voice from Syd's mouth. Being the same person explains why others are confused when Syd mentions a sister, or when "Ally" introduces herself to someone. This is weird because the first chapter is Syd discussing how physically different the two are--Ally is blond, blue-eyed, and fair-skinned while Syd has dark curly hair, darker complexion, and a ton of freckles--freckles which are later mentioned as "we both have these freckles" so whatever. (hide spoiler)] 
 I don't know why we switched to so many other perspectives--I get the dual perspectives of Syd and Ally, but I don't think we needed the very-occasional chapters from Creepy Kid's Stepmom, or Syd's best friends, or the school guidance counselor. They didn't add all that much. 
 Anyway. Predictable for me (since I've read a lot of this kind of story), though confusing for an 8th-grader.