Sender Unknown

From Author Wars - https://authorwars.com/publications/sender-unknown-411949.html

Overview:

Title: Sender Unknown
Author: Sallie Lowenstein
Year: 2006
ISBN-10: 043985704X
Publisher: Scholastic
Binding: unknown
Type: Novel
Title Reference: Sender Unknown
Notes: Data from Amazon.com as of 2013-03-13.