Black Knight (Royal Elite #4) by Rina Kent

Love is impossible. Hate is an open game.

Kimberly
He was once my best friend, now he’s my worst enemy.
Xander Knight is heartbreakingly beautiful.
Ridiculously popular.
Brutally cruel.
He’s a knight but won’t do any saving.

Xander
We started as a dream, now we’re a nightmare.
Kimberly Reed is pathetically fake.
Terribly innocent.
Secretly black.
She can hide but never from me.