Tell No One - Facts

 The book starts when Beck and Elizabeth swim in a lake in Pennsylvania. Pennsylvania is the fifth-most populous state in the United States, with over 13 million residents.

Beck lives in New Jersey. New Jersey is a northeastern U.S. state with some 130 miles of Atlantic coast. 

In her cryptic email Elizabeth asks Beck to meet her at Washington Square.Washington Square Park is a  public park in the Greenwich Village neighborhood of Lower Manhattan, New York City.