Wealthy Mrs. Harter has a heart condition. Her nephew, Charles, who lives with her, buys her a radio for amusement, but strange messages come from it. Could her dead husband really be sending her messages? And why is he warning that her life is in danger?
Agatha Christie is the most widely published author of all time, outsold only by the Bible and Shakespeare. Her books have sold more than a billion copies in English and another billion in a hundred foreign languages. She died in 1976, after a prolific career spanning six decades.