Dean Koontz - Velocity

Synopsis:
Bill Wile is an easygoing, hardworking guy who leads a quiet, ordinary life. But that is about to 
change. One evening, after his usual eight-hour bartending shift, he finds a typewritten note under 
the windshield wiper of his car. If you dont take this note to the police and get them involved, 
I will kill a lovely blond schoolteacher. If you do take this note to the police, I will instead 
kill an elderly woman active in charity work. You have four hours to decide. The choice is yours.  
Suddenly Bills average, seemingly innocuous life takes on the dimensions and speed of an accelerating 
nightmare