The Ruby Circle, by Richelle Mead

The alternating voices of the two main characters continue in this sixth and final novel of the Bloodlines series. Again this meets with limited success, as Sydney’s voice is noticeably stronger and clearer than Adrian’s. All the elements of the previous five instalments – vampires, witches, alchemists and warriors - come together in another fast-paced adventure as the crew work to rescue kidnapped Moroi princess Jill Dragomir. Along the way Adrian must battle with the seductive effects of spirit use while Sydney tries to reconcile with her Alchemist family. All while the two get a start on married life with a mother-in-law on board. Everything is tied up a tad too neatly in the end, but with a promise to revisit the Bloodlines universe at some time in the future.