Harlan Coben's Shelter

After Bolitar witnesses his father's death and sends his mom to rehab, he is forced to live with his estranged aunt and switch high schools. Fortunately, he meets a great girl, Ashley, and it seems like things might finally be improving. But then Ashley vanishes. Mickey follows Ashley's trail into a seedy underworld that reveals that she isn't who she claimed to be. And neither was Mickey's father. Soon Mickey learns about a conspiracy so shocking that it leaves him questioning everything about the life he thought he knew.