The Vision by Dean R Koontz 1977
 
Mary Bergen aids the police in solving crimes, those that have happened and those that are about to. Now this gifted clairvoyant is using her psychic gift to help track a serial killer. But something terrible from Mary's past has been invading her dreams and she is haunted by the sound of leathery wings. The killer knows secrets even she has locked away. Knows about the torture she was administered at the hands of a psycho when she was a little girl. And he is coming for her next.
 
3.3*