I am the messenger by Markus Zusak
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From the book jacket...

That's when the first ace arrives in the mail.
That's when Ed becomes the messenger.
Chosen to care, he makes his way through town helping and hurting (when necessary) until only one question remains. Who's behind Ed's mission?"
Rundown by Michael Cadnum
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From the book jacket...

Jennifer Thayer tells a shocking story. She reports a crime that never happened... with herself as the victim. Her lie wins her the attention of her mother and father and her boyfriend, and growing public acclaim as a young woman who successfully fought off a serial rapist.
But now the police have more questions. And even as detectives hunt down her alleged attacker, Jennifer learns that she is running from someone far more dangerous, someone she will never elude.
Herself."