Jack Harmon can't think of anything worse than getting picked on by the bullies at school, until he discovers an even bigger threat. After finding a cell phone, Jack begins to hear a strange voice on the other end. Jack keeps trying to make his new "friend" happy. Now everyone thinks Jack has lost his mind. How can he overcome an something that he can't see but is everywhere?

This book is part of a book series called Goosebumps .

There are 160 pages in this book. This book was published 2012 by Scholastic US .

Stine lives in Manhattan with his wife, Jane, and their son, Matthew.