House of Night. Bk. 10 : Hidden

Summary: "Neferet's evil has been exposed, and the High Council is no longer on her side - but she's far from done wreaking havoc in the vampyre world. With the seeds of distrust sown and Darkness breeding chaos at the House of Night, everyone must band together - but that's proving to be more difficult than ever before. The twins are barely speaking and the House of Night's former enemy, Kalona, has now become their warrior, pushing their trust to the limit. To top it off, Zoey is pretty darn sure she might be losing her mind. She saw something when she looked at Aurox through the Seer Stone that she can hardly explain to herself, let alone her friends. Zoe knows that following her instinct about Aurox might be just what they need to defeat evil - but if she's wrong, it could cause the destruction of those closest to her."