Victoria Aveyard - Red Queen (Red Queen #1)

The poverty stricken Reds are commoners, living under the rule of the Silvers, elite warriors with god-like powers.

To Mare Barrow, a 17-year-old Red girl from The Stilts, it looks like nothing will ever change.

Mare finds herself working in the Silver Palace, at the centre of
those she hates the most. She quickly discovers that, despite her red blood, she possesses a deadly power of her own. One that threatens to destroy Silver control.

But power is a dangerous game. And in this world divided by blood, who will win?