Last Sacrifice is the sixth book in the #1 New York Times bestselling series, Vampire Academy by Richelle Mead. It is the last book in the original storyline, but Mead will continue writing more Vampire Academy books in a spinoff series.
Lead character and dhampir, Rosemarie Hathaway, is locked in Moroi jail after being framed in the cold-blooded murder of the Moroi Queen. The punishment for this crime is immediate execution. At the same time, she is faced with the challenge of somehow locating Princess Vasilisa Dragomir's lone remaining relative, her secretly existing illegitimate sibling.