You Against Me, by Jenny Downham

In Jenny Downham's British novel " You Against Me," the ultimate mystery unravels. Told in both Mikey's and Ellie's point of views, the teens struggle to make sense of what actually happened the night Mikey's sister claims Ellie's brother raped her. Because of Mikey's family's "less fortunate'' way of living in a small apartment and their single mother's lack of authority, it would be easy for Ellie's parents to assume the young girl lied about what happened and is targeting their family out of jealously of their lavish lives. Here's the ultimate plot twist- Ellie was there the night it happened but has blocked out the memory of what she saw so much that she's drowning in doubt of her brother's innocence. It's not easy being the key witness to rape case against your brother, especially when you're falling in love with the victim's brother. 
The tension between Mikey and Ellie and even Ellie and her own family was almost unbearable in this story and I highly recommend everyone to read it, as it's not just a mystery, or even a romantic teen novel, but a true test of loyalty as well.

 - Rita , grade 12