In this summary of the document, the following key points are made: 1) The document is advertising and providing a link to listen to or download the 10th audiobook in the popular House of Night vampire series by P.C. Cast and Kristin Cast titled "Hidden". 2) In the book, darkness and evil surrounding the vampyre Neferet will no longer be hidden as Zoey and her friends seek help from the Vampyre High Council against the growing threat. 3) Neferet's true nature has been revealed and she is not going down without a fight, meaning chaos reigns at the House of Night in this installment.