This book is part of a book series called Darkest Powers Trilogy .

This book has been graded for interest at 13+ years.

There are 1104 pages in this book. This book was published 2014 by HarperCollins .

Kelley Armstrong is the author of the Women of the Otherworld series (Orbit), the Nadia Stafford crime series (Sphere) and two previous YA series (Atom). Her books are bestsellers around the world. She lives in Ontario, Canada.