Bitten - Jordan Stephanie Gray

The night Vanessa Hart’s best friend is brutally slaughtered by wolves, her life is changed forever. When her father finds Vanessa holding Celeste's dead body and sporting a nasty bite of her own, he doesn’t bring her to a hospital—he hands her over to the very creatures responsible. 

But these are no ordinary wolves...They're werewolves. And Vanessa's life now belongs to the treacherous Wolf Queen's Court.

A prisoner, Vanessa is confined to the enchanted Castle Severi, with only hatred for the wolves and nightmarish memories of Celeste's death to keep her company. But when—finally—she transforms into a werewolf, it's with the glowing purple eyes of an Alpha. Vanessa can either swear her life to the Court or die in the agony of a lone wolf.

Ushered into a world where flowering vines grow through the walls, gifts are bestowed by the stars, and a claw can break through skin as easily as silk, Vanessa must find a way to seek the vengeance she craves even as she finds herself mesmerized by the golden prince Sinclair Severi, who steals her heart though he is promised to her nemesis, and his brooding, disgraced cousin, Calix, whose smoldering gaze hides even darker secrets. 

Immersed in the magic of werewolf society, Vanessa learns its malevolence goes beyond a single murderer in a midnight forest. The Court is at war, and she may simply be a pawn in its deadly game.