Last Sacrifice By Richelle Mead

Look out for "Bloodlines," Richelle Mead's new series set in the world of Vampire Academy, coming August 2011!
The astonishing conclusion to the #1 international bestselling series, now in paperback!
Murder. Love. Jealousy. And the ultimate sacrifice.
The Queen is dead and the Moroi world will never be the same. Now, with Rose awaiting wrongful execution and Lissa in a deadly struggle for the royal throne, the girls find themselves forced to rely upon enemies and to question those they thought they could trust. . . .
But what if true freedom means sacrificing the most important thing of all?
Each other.