This book is part two to the book, "Dead Air"...and what a thrilling book it is. The writing style is such that if you haven't read the first book, its stands on its own merit as a complete story and you'd never know it was a part 2.
The story deals with a teenage daughter who, despite being rescued from an occult group earlier as a young child, gets involved with the occult through school peers. She begins to exhibit behavior that concerns her parents who then seek the help of a professional.
As the story develops, you're unable to put the book down! Without spoiling anything, the book does indeed have a happy ending. :)