"The Operator" is a tense psychological thriller by the famous writer Robin Cook. The main character, a young woman named Kate, works as an operator at an ambulance station. However, her usual working day turns into a nightmare when she receives a mysterious call from a girl who claims that she has been kidnapped and that she and her loved ones are in great danger. Kate must quickly discover the whereabouts of the ringer, but time is running out, and every decision can have vital consequences. "The Operator" is an exciting book about tension, stress, risk and the inner strength of the main character who faces danger to save someone's life.