Vampire Academy: Spirit Bound (book 5)

Dimitri gave Rose the ultimate choice. And she made the wrong one... After a long and heartbreaking journey to Dimitri's birthplace in Siberia, Rose Hathaway has finally returned to St. Vladimir's Academy - and to her best friend, Lissa. But Rose's heart still aches for Dimitri, and she knows he's out there, somewhere. She failed to kill him when she had the chance. And now her worst fears are about to come true- Dimitri has tasted her blood, and now he is hunting her. Only this time, he won't rest until Rose joins him... forever.