Shadow Kiss (Vampire Academy)

A New York Times Bestseller -- Rose knows her love for Dimitri Belikov is forbidden. Her best friend, Lissa -- the last Dragomir princess -- must always come first. But a strange darkness begins to grow in Rose's mind. The immortal undead are closing in, and they want vengeance for the lives Rose has stolen. In a heart-stopping battle, Rose will have to choose between life, love, and the two people who matter most...but will her choice mean that only one can survive?